86377921561 has 8 divisors (see below), whose sum is σ = 91611082944. Its totient is φ = 81267893520.

The previous prime is 86377921529. The next prime is 86377921583. The reversal of 86377921561 is 16512977368.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86377921561 - 2⁵ = 86377921529 is a prime.

It is a super-2 number, since 2×86377921561² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86377931561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30781891 + ... + 30784696.

It is an arithmetic number, because the mean of its divisors is an integer number (11451385368).

Almost surely, 2^86377921561 is an apocalyptic number.

It is an amenable number.

86377921561 is a deficient number, since it is larger than the sum of its proper divisors (5233161383).

86377921561 is a wasteful number, since it uses less digits than its factorization.

86377921561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61566671.

The product of its digits is 3810240, while the sum is 55.

The spelling of 86377921561 in words is "eighty-six billion, three hundred seventy-seven million, nine hundred twenty-one thousand, five hundred sixty-one".