90732776768 has 56 divisors (see below), whose sum is σ = 184953322752. Its totient is φ = 44138594304.

The previous prime is 90732776767. The next prime is 90732776773. The reversal of 90732776768 is 86767723709.

It is a self number, because there is not a number n which added to its sum of digits gives 90732776768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90732776767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643121 + ... + 771407.

Almost surely, 2^90732776768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90732776768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92476661376).

90732776768 is an abundant number, since it is smaller than the sum of its proper divisors (94220545984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90732776768 is a wasteful number, since it uses less digits than its factorization.

90732776768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128599 (or 128589 counting only the distinct ones).

The product of its (nonzero) digits is 37340352, while the sum is 62.

The spelling of 90732776768 in words is "ninety billion, seven hundred thirty-two million, seven hundred seventy-six thousand, seven hundred sixty-eight".