90816605551 has 24 divisors (see below), whose sum is σ = 108288540672. Its totient is φ = 74599801200.

The previous prime is 90816605513. The next prime is 90816605647. The reversal of 90816605551 is 15550661809.

It is not a de Polignac number, because 90816605551 - 2¹⁵ = 90816572783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90816605501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 627346 + ... + 758416.

It is an arithmetic number, because the mean of its divisors is an integer number (4512022528).

Almost surely, 2^90816605551 is an apocalyptic number.

90816605551 is a deficient number, since it is larger than the sum of its proper divisors (17471935121).

90816605551 is a wasteful number, since it uses less digits than its factorization.

90816605551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131243 (or 131212 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 90816605551 in words is "ninety billion, eight hundred sixteen million, six hundred five thousand, five hundred fifty-one".