86868626521 has 4 divisors (see below), whose sum is σ = 86894771472. Its totient is φ = 86842481572.

The previous prime is 86868626513. The next prime is 86868626543. The reversal of 86868626521 is 12562686868.

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 86868626521 - 2³ = 86868626513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86868626501) 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, 13067491 + ... + 13074136.

It is an arithmetic number, because the mean of its divisors is an integer number (21723692868).

Almost surely, 2^86868626521 is an apocalyptic number.

It is an amenable number.

86868626521 is a deficient number, since it is larger than the sum of its proper divisors (26144951).

86868626521 is a wasteful number, since it uses less digits than its factorization.

86868626521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26144950.

The product of its digits is 13271040, while the sum is 58.

The spelling of 86868626521 in words is "eighty-six billion, eight hundred sixty-eight million, six hundred twenty-six thousand, five hundred twenty-one".