640312510152 has 96 divisors (see below), whose sum is σ = 1862623300320. Its totient is φ = 182898293760.

The previous prime is 640312510147. The next prime is 640312510181. The reversal of 640312510152 is 251015213046.

It is a super-2 number, since 2×640312510152² (a number of 24 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 4524952 + ... + 4664312.

It is an arithmetic number, because the mean of its divisors is an integer number (19402326045).

Almost surely, 2^640312510152 is an apocalyptic number.

It is an amenable number.

640312510152 is an abundant number, since it is smaller than the sum of its proper divisors (1222310790168).

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

640312510152 is a wasteful number, since it uses less digits than its factorization.

640312510152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143291 (or 143280 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 640312510152 its reverse (251015213046), we get a palindrome (891327723198).

The spelling of 640312510152 in words is "six hundred forty billion, three hundred twelve million, five hundred ten thousand, one hundred fifty-two".