90912032981 has 32 divisors (see below), whose sum is σ = 119465798400. Its totient is φ = 67107156480.

The previous prime is 90912032971. The next prime is 90912032987. The reversal of 90912032981 is 18923021909.

It is a happy number.

It is not a de Polignac number, because 90912032981 - 2⁶ = 90912032917 is a prime.

It is a super-2 number, since 2×90912032981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90912032987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265736 + ... + 502433.

It is an arithmetic number, because the mean of its divisors is an integer number (3733306200).

Almost surely, 2^90912032981 is an apocalyptic number.

It is an amenable number.

90912032981 is a deficient number, since it is larger than the sum of its proper divisors (28553765419).

90912032981 is a wasteful number, since it uses less digits than its factorization.

90912032981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768269.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 90912032981 in words is "ninety billion, nine hundred twelve million, thirty-two thousand, nine hundred eighty-one".