90560044621 has 2 divisors, whose sum is σ = 90560044622. Its totient is φ = 90560044620.

The previous prime is 90560044513. The next prime is 90560044639. The reversal of 90560044621 is 12644006509.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74095562025 + 16464482596 = 272205^2 + 128314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90560044621 is a prime.

It is a super-2 number, since 2×90560044621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90560044121) 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 as a sum of consecutive naturals, namely, 45280022310 + 45280022311.

It is an arithmetic number, because the mean of its divisors is an integer number (45280022311).

Almost surely, 2^90560044621 is an apocalyptic number.

It is an amenable number.

90560044621 is a deficient number, since it is larger than the sum of its proper divisors (1).

90560044621 is an equidigital number, since it uses as much as digits as its factorization.

90560044621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 90560044621 in words is "ninety billion, five hundred sixty million, forty-four thousand, six hundred twenty-one".