86172821317015 has 8 divisors (see below), whose sum is σ = 103447826497440. Its totient is φ = 68911296442272.

The previous prime is 86172821316979. The next prime is 86172821317039. The reversal of 86172821317015 is 51071312827168.

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 86172821317015 - 2²⁹ = 86172284446103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3370062355 + ... + 3370087924.

It is an arithmetic number, because the mean of its divisors is an integer number (12930978312180).

Almost surely, 2^{86172821317015} is an apocalyptic number.

86172821317015 is a deficient number, since it is larger than the sum of its proper divisors (17275005180425).

86172821317015 is a wasteful number, since it uses less digits than its factorization.

86172821317015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740152841.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 86172821317015 in words is "eighty-six trillion, one hundred seventy-two billion, eight hundred twenty-one million, three hundred seventeen thousand, fifteen".