64866550140 has 192 divisors, whose sum is σ = 244203724800. Its totient is φ = 13954470912.

The previous prime is 64866550039. The next prime is 64866550181. The reversal of 64866550140 is 4105566846.

64866550140 is a `hidden beast` number, since 6 + 4 + 86 + 6 + 550 + 14 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 440460 + ... + 568979.

It is an arithmetic number, because the mean of its divisors is an integer number (1271894400).

Almost surely, 2^64866550140 is an apocalyptic number.

64866550140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64866550140 is an abundant number, since it is smaller than the sum of its proper divisors (179337174660).

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

64866550140 is a wasteful number, since it uses less digits than its factorization.

64866550140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009481 (or 1009473 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 64866550140 in words is "sixty-four billion, eight hundred sixty-six million, five hundred fifty thousand, one hundred forty".