90560762221 has 2 divisors, whose sum is σ = 90560762222. Its totient is φ = 90560762220.

The previous prime is 90560762219. The next prime is 90560762267. The reversal of 90560762221 is 12226706509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78181752100 + 12379010121 = 279610^2 + 111261^2 .

It is a cyclic number.

It is not a de Polignac number, because 90560762221 - 2¹ = 90560762219 is a prime.

Together with 90560762219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90560762021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45280381110 + 45280381111.

It is an arithmetic number, because the mean of its divisors is an integer number (45280381111).

Almost surely, 2^90560762221 is an apocalyptic number.

It is an amenable number.

90560762221 is a deficient number, since it is larger than the sum of its proper divisors (1).

90560762221 is an equidigital number, since it uses as much as digits as its factorization.

90560762221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 90560762221 in words is "ninety billion, five hundred sixty million, seven hundred sixty-two thousand, two hundred twenty-one".