90850456512981 has 32 divisors (see below), whose sum is σ = 146834811446400. Its totient is φ = 55058711178240.

The previous prime is 90850456512961. The next prime is 90850456513013. The reversal of 90850456512981 is 18921565405809.

90850456512981 is a `hidden beast` number, since 9 + 0 + 8 + 50 + 4 + 565 + 12 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 90850456512981 - 2⁴² = 86452410001877 is a prime.

It is a super-2 number, since 2×90850456512981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90850456512961) 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 in 31 ways as a sum of consecutive naturals, for example, 1527075 + ... + 13565871.

It is an arithmetic number, because the mean of its divisors is an integer number (4588587857700).

Almost surely, 2^{90850456512981} is an apocalyptic number.

It is an amenable number.

90850456512981 is a deficient number, since it is larger than the sum of its proper divisors (55984354933419).

90850456512981 is a wasteful number, since it uses less digits than its factorization.

90850456512981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12064226 (or 12064220 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 63.

The spelling of 90850456512981 in words is "ninety trillion, eight hundred fifty billion, four hundred fifty-six million, five hundred twelve thousand, nine hundred eighty-one".