640483334832 has 80 divisors (see below), whose sum is σ = 1849022904960. Its totient is φ = 189352051200.

The previous prime is 640483334789. The next prime is 640483334867. The reversal of 640483334832 is 238433384046.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14771482 + ... + 14814777.

It is an arithmetic number, because the mean of its divisors is an integer number (23112786312).

Almost surely, 2^640483334832 is an apocalyptic number.

It is an amenable number.

640483334832 is an abundant number, since it is smaller than the sum of its proper divisors (1208539570128).

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

640483334832 is a wasteful number, since it uses less digits than its factorization.

640483334832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29586322 (or 29586316 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 640483334832 in words is "six hundred forty billion, four hundred eighty-three million, three hundred thirty-four thousand, eight hundred thirty-two".