86487912681 has 4 divisors (see below), whose sum is σ = 115317216912. Its totient is φ = 57658608452.

The previous prime is 86487912673. The next prime is 86487912691. The reversal of 86487912681 is 18621978468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86487912681 - 2³ = 86487912673 is a prime.

It is a super-2 number, since 2×86487912681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86487912631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14414652111 + ... + 14414652116.

It is an arithmetic number, because the mean of its divisors is an integer number (28829304228).

Almost surely, 2^86487912681 is an apocalyptic number.

It is an amenable number.

86487912681 is a deficient number, since it is larger than the sum of its proper divisors (28829304231).

86487912681 is a wasteful number, since it uses less digits than its factorization.

86487912681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28829304230.

The product of its digits is 9289728, while the sum is 60.

The spelling of 86487912681 in words is "eighty-six billion, four hundred eighty-seven million, nine hundred twelve thousand, six hundred eighty-one".