86180978671 has 8 divisors (see below), whose sum is σ = 87439730688. Its totient is φ = 84923475000.

The previous prime is 86180978617. The next prime is 86180978687. The reversal of 86180978671 is 17687908168.

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 86180978671 - 2²¹ = 86178881519 is a prime.

It is a super-2 number, since 2×86180978671² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86180978371) 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, 172555 + ... + 449596.

It is an arithmetic number, because the mean of its divisors is an integer number (10929966336).

Almost surely, 2^86180978671 is an apocalyptic number.

86180978671 is a deficient number, since it is larger than the sum of its proper divisors (1258752017).

86180978671 is a wasteful number, since it uses less digits than its factorization.

86180978671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624173.

The product of its (nonzero) digits is 8128512, while the sum is 61.

The spelling of 86180978671 in words is "eighty-six billion, one hundred eighty million, nine hundred seventy-eight thousand, six hundred seventy-one".