90388056251573 has 2 divisors, whose sum is σ = 90388056251574. Its totient is φ = 90388056251572.

The previous prime is 90388056251551. The next prime is 90388056251587. The reversal of 90388056251573 is 37515265088309.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51342641882884 + 39045414368689 = 7165378^2 + 6248633^2 .

It is a cyclic number.

It is not a de Polignac number, because 90388056251573 - 2²⁴ = 90388039474357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90388056251513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45194028125786 + 45194028125787.

It is an arithmetic number, because the mean of its divisors is an integer number (45194028125787).

Almost surely, 2^{90388056251573} is an apocalyptic number.

It is an amenable number.

90388056251573 is a deficient number, since it is larger than the sum of its proper divisors (1).

90388056251573 is an equidigital number, since it uses as much as digits as its factorization.

90388056251573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432000, while the sum is 62.

The spelling of 90388056251573 in words is "ninety trillion, three hundred eighty-eight billion, fifty-six million, two hundred fifty-one thousand, five hundred seventy-three".