64194797884140 has 672 divisors, whose sum is σ = 266818528617984. Its totient is φ = 12554517473280.

The previous prime is 64194797884127. The next prime is 64194797884153. The reversal of 64194797884140 is 4148879749146.

It is a happy number.

64194797884140 is a `hidden beast` number, since 6 + 4 + 1 + 9 + 47 + 97 + 88 + 414 + 0 = 666.

64194797884140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64194797884127) and next prime (64194797884153).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 17403427 + ... + 20767013.

It is an arithmetic number, because the mean of its divisors is an integer number (397051381872).

Almost surely, 2^{64194797884140} is an apocalyptic number.

64194797884140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64194797884140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133409264308992).

64194797884140 is an abundant number, since it is smaller than the sum of its proper divisors (202623730733844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64194797884140 is a wasteful number, since it uses less digits than its factorization.

64194797884140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363649 (or 3363632 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 72.

The spelling of 64194797884140 in words is "sixty-four trillion, one hundred ninety-four billion, seven hundred ninety-seven million, eight hundred eighty-four thousand, one hundred forty".