87537520138 has 32 divisors (see below), whose sum is σ = 142139448000. Its totient is φ = 40304246400.

The previous prime is 87537520123. The next prime is 87537520141. The reversal of 87537520138 is 83102573578.

It is a junction number, because it is equal to n+sod(n) for n = 87537520091 and 87537520100.

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, 19813 + ... + 418888.

It is an arithmetic number, because the mean of its divisors is an integer number (4441857750).

Almost surely, 2^87537520138 is an apocalyptic number.

87537520138 is a deficient number, since it is larger than the sum of its proper divisors (54601927862).

87537520138 is a wasteful number, since it uses less digits than its factorization.

87537520138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438870.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 87537520138 in words is "eighty-seven billion, five hundred thirty-seven million, five hundred twenty thousand, one hundred thirty-eight".