85615295621 has 4 divisors (see below), whose sum is σ = 85650115200. Its totient is φ = 85580476044.

The previous prime is 85615295609. The next prime is 85615295627. The reversal of 85615295621 is 12659251658.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85615295621 - 2¹⁸ = 85615033477 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 85615295621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85615295627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17406101 + ... + 17411018.

It is an arithmetic number, because the mean of its divisors is an integer number (21412528800).

Almost surely, 2^85615295621 is an apocalyptic number.

It is an amenable number.

85615295621 is a deficient number, since it is larger than the sum of its proper divisors (34819579).

85615295621 is a wasteful number, since it uses less digits than its factorization.

85615295621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34819578.

The product of its digits is 1296000, while the sum is 50.

The spelling of 85615295621 in words is "eighty-five billion, six hundred fifteen million, two hundred ninety-five thousand, six hundred twenty-one".