86172005427 has 16 divisors (see below), whose sum is σ = 119390960640. Its totient is φ = 55218294432.

The previous prime is 86172005419. The next prime is 86172005429. The reversal of 86172005427 is 72450027168.

It is not a de Polignac number, because 86172005427 - 2³ = 86172005419 is a prime.

It is a super-2 number, since 2×86172005427² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86172005429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2201413 + ... + 2240214.

It is an arithmetic number, because the mean of its divisors is an integer number (7461935040).

Almost surely, 2^86172005427 is an apocalyptic number.

86172005427 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

86172005427 is a deficient number, since it is larger than the sum of its proper divisors (33218955213).

86172005427 is a wasteful number, since it uses less digits than its factorization.

86172005427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441882.

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 86172005427 in words is "eighty-six billion, one hundred seventy-two million, five thousand, four hundred twenty-seven".