90773521684 has 12 divisors (see below), whose sum is σ = 159444198900. Its totient is φ = 45218036288.

The previous prime is 90773521679. The next prime is 90773521693. The reversal of 90773521684 is 48612537709.

It can be written as a sum of positive squares in 2 ways, for example, as 2701088784 + 88072432900 = 51972^2 + 296770^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42179929 + ... + 42182080.

It is an arithmetic number, because the mean of its divisors is an integer number (13287016575).

It is a 1-persistent number, because it is pandigital, but 2⋅90773521684 = 181547043368 is not.

Almost surely, 2^90773521684 is an apocalyptic number.

It is an amenable number.

90773521684 is a deficient number, since it is larger than the sum of its proper divisors (68670677216).

90773521684 is a wasteful number, since it uses less digits than its factorization.

90773521684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84362282 (or 84362280 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 90773521684 in words is "ninety billion, seven hundred seventy-three million, five hundred twenty-one thousand, six hundred eighty-four".