87368043521 has 16 divisors (see below), whose sum is σ = 97935740928. Its totient is φ = 77258610000.

The previous prime is 87368043517. The next prime is 87368043563. The reversal of 87368043521 is 12534086378.

It is not a de Polignac number, because 87368043521 - 2² = 87368043517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87368043221) 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, 434105 + ... + 602646.

It is an arithmetic number, because the mean of its divisors is an integer number (6120983808).

Almost surely, 2^87368043521 is an apocalyptic number.

It is an amenable number.

87368043521 is a deficient number, since it is larger than the sum of its proper divisors (10567697407).

87368043521 is a wasteful number, since it uses less digits than its factorization.

87368043521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036972.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 87368043521 in words is "eighty-seven billion, three hundred sixty-eight million, forty-three thousand, five hundred twenty-one".