85902774521 has 32 divisors (see below), whose sum is σ = 93373378560. Its totient is φ = 78779929536.

The previous prime is 85902774479. The next prime is 85902774523. The reversal of 85902774521 is 12547720958.

It is a cyclic number.

It is not a de Polignac number, because 85902774521 - 2³⁰ = 84829032697 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 85902774521.

It is not an unprimeable number, because it can be changed into a prime (85902774523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20812760 + ... + 20816886.

It is an arithmetic number, because the mean of its divisors is an integer number (2917918080).

Almost surely, 2^85902774521 is an apocalyptic number.

It is an amenable number.

85902774521 is a deficient number, since it is larger than the sum of its proper divisors (7470604039).

85902774521 is a wasteful number, since it uses less digits than its factorization.

85902774521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 85902774521 in words is "eighty-five billion, nine hundred two million, seven hundred seventy-four thousand, five hundred twenty-one".