57438670638 has 16 divisors (see below), whose sum is σ = 119872008576. Its totient is φ = 18313779000.

The previous prime is 57438670603. The next prime is 57438670643. The reversal of 57438670638 is 83607683475.

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, 208110988 + ... + 208111263.

It is an arithmetic number, because the mean of its divisors is an integer number (7492000536).

Almost surely, 2^57438670638 is an apocalyptic number.

57438670638 is an abundant number, since it is smaller than the sum of its proper divisors (62433337938).

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

57438670638 is a wasteful number, since it uses less digits than its factorization.

57438670638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416222279.

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 57438670638 in words is "fifty-seven billion, four hundred thirty-eight million, six hundred seventy thousand, six hundred thirty-eight".