643149750752 has 48 divisors (see below), whose sum is σ = 1300572962640. Its totient is φ = 312847515648.

The previous prime is 643149750713. The next prime is 643149750769. The reversal of 643149750752 is 257057941346.

It is a junction number, because it is equal to n+sod(n) for n = 643149750694 and 643149750703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12250703 + ... + 12303089.

It is an arithmetic number, because the mean of its divisors is an integer number (27095270055).

Almost surely, 2^643149750752 is an apocalyptic number.

It is an amenable number.

643149750752 is an abundant number, since it is smaller than the sum of its proper divisors (657423211888).

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

643149750752 is a wasteful number, since it uses less digits than its factorization.

643149750752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62803 (or 62795 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 53.

The spelling of 643149750752 in words is "six hundred forty-three billion, one hundred forty-nine million, seven hundred fifty thousand, seven hundred fifty-two".