87681427886 has 32 divisors (see below), whose sum is σ = 149117928960. Its totient is φ = 38332266336.

The previous prime is 87681427843. The next prime is 87681427903. The reversal of 87681427886 is 68872418678.

It is a super-2 number, since 2×87681427886² (a number of 23 digits) contains 22 as substring.

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, 4499015 + ... + 4518461.

It is an arithmetic number, because the mean of its divisors is an integer number (4659935280).

Almost surely, 2^87681427886 is an apocalyptic number.

87681427886 is a deficient number, since it is larger than the sum of its proper divisors (61436501074).

87681427886 is a wasteful number, since it uses less digits than its factorization.

87681427886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28608.

The product of its digits is 57802752, while the sum is 65.

The spelling of 87681427886 in words is "eighty-seven billion, six hundred eighty-one million, four hundred twenty-seven thousand, eight hundred eighty-six".