643077631752 has 64 divisors (see below), whose sum is σ = 1627310606400. Its totient is φ = 211748275200.

The previous prime is 643077631751. The next prime is 643077631787. The reversal of 643077631752 is 257136770346.

It is a junction number, because it is equal to n+sod(n) for n = 643077631695 and 643077631704.

It is not an unprimeable number, because it can be changed into a prime (643077631751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2101708 + ... + 2388164.

It is an arithmetic number, because the mean of its divisors is an integer number (25426728225).

Almost surely, 2^643077631752 is an apocalyptic number.

It is an amenable number.

643077631752 is an abundant number, since it is smaller than the sum of its proper divisors (984232974648).

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

643077631752 is a wasteful number, since it uses less digits than its factorization.

643077631752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287606 (or 287602 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 51.

The spelling of 643077631752 in words is "six hundred forty-three billion, seventy-seven million, six hundred thirty-one thousand, seven hundred fifty-two".