643082770038 has 16 divisors (see below), whose sum is σ = 1287134784000. Its totient is φ = 214199382696.

The previous prime is 643082770021. The next prime is 643082770087. The reversal of 643082770038 is 830077280346.

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, 40376538 + ... + 40392461.

It is an arithmetic number, because the mean of its divisors is an integer number (80445924000).

Almost surely, 2^643082770038 is an apocalyptic number.

643082770038 is an abundant number, since it is smaller than the sum of its proper divisors (644052013962).

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

643082770038 is a wasteful number, since it uses less digits than its factorization.

643082770038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80770331.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 643082770038 in words is "six hundred forty-three billion, eighty-two million, seven hundred seventy thousand, thirty-eight".