87507748138 has 16 divisors (see below), whose sum is σ = 135109528200. Its totient is φ = 42476507136.

The previous prime is 87507748121. The next prime is 87507748151. The reversal of 87507748138 is 83184770578.

It can be written as a sum of positive squares in 4 ways, for example, as 82689028249 + 4818719889 = 287557^2 + 69417^2 .

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, 1283631 + ... + 1350082.

Almost surely, 2^87507748138 is an apocalyptic number.

87507748138 is a deficient number, since it is larger than the sum of its proper divisors (47601780062).

87507748138 is a wasteful number, since it uses less digits than its factorization.

87507748138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634201.

The product of its (nonzero) digits is 10536960, while the sum is 58.

The spelling of 87507748138 in words is "eighty-seven billion, five hundred seven million, seven hundred forty-eight thousand, one hundred thirty-eight".