90742551013 has 2 divisors, whose sum is σ = 90742551014. Its totient is φ = 90742551012.

The previous prime is 90742550981. The next prime is 90742551047. The reversal of 90742551013 is 31015524709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46043288929 + 44699262084 = 214577^2 + 211422^2 .

It is a cyclic number.

It is not a de Polignac number, because 90742551013 - 2⁵ = 90742550981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90742551113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45371275506 + 45371275507.

It is an arithmetic number, because the mean of its divisors is an integer number (45371275507).

Almost surely, 2^90742551013 is an apocalyptic number.

It is an amenable number.

90742551013 is a deficient number, since it is larger than the sum of its proper divisors (1).

90742551013 is an equidigital number, since it uses as much as digits as its factorization.

90742551013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 90742551013 in words is "ninety billion, seven hundred forty-two million, five hundred fifty-one thousand, thirteen".