640148326832 has 60 divisors (see below), whose sum is σ = 1443180074760. Its totient is φ = 274273832448.

The previous prime is 640148326823. The next prime is 640148326841. The reversal of 640148326832 is 238623841046.

It is an interprime number because it is at equal distance from previous prime (640148326823) and next prime (640148326841).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2788019 + ... + 3008877.

It is an arithmetic number, because the mean of its divisors is an integer number (24053001246).

Almost surely, 2^640148326832 is an apocalyptic number.

It is an amenable number.

640148326832 is an abundant number, since it is smaller than the sum of its proper divisors (803031747928).

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

640148326832 is a wasteful number, since it uses less digits than its factorization.

640148326832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224578 (or 224565 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 640148326832 in words is "six hundred forty billion, one hundred forty-eight million, three hundred twenty-six thousand, eight hundred thirty-two".