90081312988 has 48 divisors (see below), whose sum is σ = 174381076800. Its totient is φ = 40524108800.

The previous prime is 90081312973. The next prime is 90081312989. The reversal of 90081312988 is 88921318009.

It is a super-2 number, since 2×90081312988² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90081312989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26968 + ... + 425311.

It is an arithmetic number, because the mean of its divisors is an integer number (3632939100).

Almost surely, 2^90081312988 is an apocalyptic number.

It is an amenable number.

90081312988 is a deficient number, since it is larger than the sum of its proper divisors (84299763812).

90081312988 is a wasteful number, since it uses less digits than its factorization.

90081312988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452430 (or 452428 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 90081312988 in words is "ninety billion, eighty-one million, three hundred twelve thousand, nine hundred eighty-eight".