90931356968 has 8 divisors (see below), whose sum is σ = 170496294330. Its totient is φ = 45465678480.

The previous prime is 90931356961. The next prime is 90931356983. The reversal of 90931356968 is 86965313909.

It can be written as a sum of positive squares in only one way, i.e., 61820855044 + 29110501924 = 248638^2 + 170618^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (90931356961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5683209803 + ... + 5683209818.

Almost surely, 2^90931356968 is an apocalyptic number.

It is an amenable number.

90931356968 is a deficient number, since it is larger than the sum of its proper divisors (79564937362).

90931356968 is a wasteful number, since it uses less digits than its factorization.

90931356968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11366419627 (or 11366419623 counting only the distinct ones).

The product of its (nonzero) digits is 9447840, while the sum is 59.

The spelling of 90931356968 in words is "ninety billion, nine hundred thirty-one million, three hundred fifty-six thousand, nine hundred sixty-eight".