86544731173021 has 32 divisors (see below), whose sum is σ = 100961455988736. Its totient is φ = 73390742832000.

The previous prime is 86544731172967. The next prime is 86544731173037. The reversal of 86544731173021 is 12037113744568.

It is a happy number.

It is not a de Polignac number, because 86544731173021 - 2²⁹ = 86544194302109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86544731173021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86544731173321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23677936 + ... + 27087526.

It is an arithmetic number, because the mean of its divisors is an integer number (3155045499648).

Almost surely, 2^{86544731173021} is an apocalyptic number.

It is an amenable number.

86544731173021 is a deficient number, since it is larger than the sum of its proper divisors (14416724815715).

86544731173021 is a wasteful number, since it uses less digits than its factorization.

86544731173021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412113.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 86544731173021 in words is "eighty-six trillion, five hundred forty-four billion, seven hundred thirty-one million, one hundred seventy-three thousand, twenty-one".