640375335400 has 48 divisors (see below), whose sum is σ = 1488925283040. Its totient is φ = 256141080000.

The previous prime is 640375335349. The next prime is 640375335427. The reversal of 640375335400 is 4533573046.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 11 ways as a sum of consecutive naturals, for example, 11156775 + ... + 11214025.

It is an arithmetic number, because the mean of its divisors is an integer number (31019276730).

Almost surely, 2^640375335400 is an apocalyptic number.

It is an amenable number.

640375335400 is an abundant number, since it is smaller than the sum of its proper divisors (848549947640).

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

640375335400 is a wasteful number, since it uses less digits than its factorization.

640375335400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113194 (or 113185 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 40.

The spelling of 640375335400 in words is "six hundred forty billion, three hundred seventy-five million, three hundred thirty-five thousand, four hundred".