90772745944 has 32 divisors (see below), whose sum is σ = 177622917120. Its totient is φ = 43407169696.

The previous prime is 90772745939. The next prime is 90772745953. The reversal of 90772745944 is 44954727709.

It is a happy number.

It is a super-2 number, since 2×90772745944² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1525047 + ... + 1583449.

It is an arithmetic number, because the mean of its divisors is an integer number (5550716160).

Almost surely, 2^90772745944 is an apocalyptic number.

It is an amenable number.

90772745944 is a deficient number, since it is larger than the sum of its proper divisors (86850171176).

90772745944 is a wasteful number, since it uses less digits than its factorization.

90772745944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66879 (or 66875 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 58.

The spelling of 90772745944 in words is "ninety billion, seven hundred seventy-two million, seven hundred forty-five thousand, nine hundred forty-four".