90420624961 has 4 divisors (see below), whose sum is σ = 90715154992. Its totient is φ = 90126094932.

The previous prime is 90420624919. The next prime is 90420624971. The reversal of 90420624961 is 16942602409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90420624961 - 2²⁹ = 89883754049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90420624971) 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 3 ways as a sum of consecutive naturals, for example, 147264555 + ... + 147265168.

It is an arithmetic number, because the mean of its divisors is an integer number (22678788748).

Almost surely, 2^90420624961 is an apocalyptic number.

It is an amenable number.

90420624961 is a deficient number, since it is larger than the sum of its proper divisors (294530031).

90420624961 is a wasteful number, since it uses less digits than its factorization.

90420624961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294530030.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 90420624961 in words is "ninety billion, four hundred twenty million, six hundred twenty-four thousand, nine hundred sixty-one".