90890918531451 has 6 divisors (see below), whose sum is σ = 131286882323220. Its totient is φ = 60593945687628.

The previous prime is 90890918531419. The next prime is 90890918531521. The reversal of 90890918531451 is 15413581909809.

90890918531451 is a `hidden beast` number, since 9 + 0 + 8 + 9 + 0 + 91 + 8 + 531 + 4 + 5 + 1 = 666.

It is not a de Polignac number, because 90890918531451 - 2⁵ = 90890918531419 is a prime.

It is a super-2 number, since 2×90890918531451² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90890918531411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5049495473961 + ... + 5049495473978.

It is an arithmetic number, because the mean of its divisors is an integer number (21881147053870).

Almost surely, 2^{90890918531451} is an apocalyptic number.

90890918531451 is a deficient number, since it is larger than the sum of its proper divisors (40395963791769).

90890918531451 is a wasteful number, since it uses less digits than its factorization.

90890918531451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10098990947945 (or 10098990947942 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 63.

The spelling of 90890918531451 in words is "ninety trillion, eight hundred ninety billion, nine hundred eighteen million, five hundred thirty-one thousand, four hundred fifty-one".