47571157786638 has 32 divisors (see below), whose sum is σ = 100747816947360. Its totient is φ = 14922967080960.

The previous prime is 47571157786613. The next prime is 47571157786667. The reversal of 47571157786638 is 83668775117574.

It is a super-2 number, since 2×47571157786638² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47571157786638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19428073 + ... + 21739188.

It is an arithmetic number, because the mean of its divisors is an integer number (3148369279605).

Almost surely, 2^{47571157786638} is an apocalyptic number.

47571157786638 is an abundant number, since it is smaller than the sum of its proper divisors (53176659160722).

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

47571157786638 is a wasteful number, since it uses less digits than its factorization.

47571157786638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41178612.

The product of its digits is 1659571200, while the sum is 75.

The spelling of 47571157786638 in words is "forty-seven trillion, five hundred seventy-one billion, one hundred fifty-seven million, seven hundred eighty-six thousand, six hundred thirty-eight".