86844506421 has 16 divisors (see below), whose sum is σ = 121311930368. Its totient is φ = 55192460400.

The previous prime is 86844506401. The next prime is 86844506447. The reversal of 86844506421 is 12460544868.

It is not a de Polignac number, because 86844506421 - 2⁵ = 86844506389 is a prime.

It is a super-2 number, since 2×86844506421² (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 (86844506401) 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, 6962515 + ... + 6974976.

It is an arithmetic number, because the mean of its divisors is an integer number (7581995648).

Almost surely, 2^86844506421 is an apocalyptic number.

It is an amenable number.

86844506421 is a deficient number, since it is larger than the sum of its proper divisors (34467423947).

86844506421 is a wasteful number, since it uses less digits than its factorization.

86844506421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13937592.

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 86844506421 in words is "eighty-six billion, eight hundred forty-four million, five hundred six thousand, four hundred twenty-one".