642572215400 has 48 divisors (see below), whose sum is σ = 1545496980300. Its totient is φ = 248165818880.

The previous prime is 642572215391. The next prime is 642572215457. The reversal of 642572215400 is 4512275246.

It can be written as a sum of positive squares in 6 ways, for example, as 250378142884 + 392194072516 = 500378^2 + 626254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55388357 + ... + 55399956.

Almost surely, 2^642572215400 is an apocalyptic number.

It is an amenable number.

642572215400 is an abundant number, since it is smaller than the sum of its proper divisors (902924764900).

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

642572215400 is a wasteful number, since it uses less digits than its factorization.

642572215400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110788358 (or 110788349 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 642572215400 in words is "six hundred forty-two billion, five hundred seventy-two million, two hundred fifteen thousand, four hundred".