87961089838 has 16 divisors (see below), whose sum is σ = 133021239120. Its totient is φ = 43621891456.

The previous prime is 87961089809. The next prime is 87961089847. The reversal of 87961089838 is 83898016978.

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, 158395 + ... + 448342.

It is an arithmetic number, because the mean of its divisors is an integer number (8313827445).

Almost surely, 2^87961089838 is an apocalyptic number.

87961089838 is a deficient number, since it is larger than the sum of its proper divisors (45060149282).

87961089838 is a wasteful number, since it uses less digits than its factorization.

87961089838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607331.

The product of its (nonzero) digits is 41803776, while the sum is 67.

The spelling of 87961089838 in words is "eighty-seven billion, nine hundred sixty-one million, eighty-nine thousand, eight hundred thirty-eight".