64278074160 has 120 divisors (see below), whose sum is σ = 216107395920. Its totient is φ = 17121747456.

The previous prime is 64278074149. The next prime is 64278074167. The reversal of 64278074160 is 6147087246.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64278074167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 603826 + ... + 702254.

It is an arithmetic number, because the mean of its divisors is an integer number (1800894966).

Almost surely, 2^64278074160 is an apocalyptic number.

64278074160 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 64278074160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108053697960).

64278074160 is an abundant number, since it is smaller than the sum of its proper divisors (151829321760).

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

64278074160 is a wasteful number, since it uses less digits than its factorization.

64278074160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99355 (or 99346 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 64278074160 in words is "sixty-four billion, two hundred seventy-eight million, seventy-four thousand, one hundred sixty".