90156399313 has 2 divisors, whose sum is σ = 90156399314. Its totient is φ = 90156399312.

The previous prime is 90156399283. The next prime is 90156399383. The reversal of 90156399313 is 31399365109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87966814464 + 2189584849 = 296592^2 + 46793^2 .

It is a cyclic number.

It is not a de Polignac number, because 90156399313 - 2²⁵ = 90122844881 is a prime.

It is not a weakly prime, because it can be changed into another prime (90156399383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45078199656 + 45078199657.

It is an arithmetic number, because the mean of its divisors is an integer number (45078199657).

Almost surely, 2^90156399313 is an apocalyptic number.

It is an amenable number.

90156399313 is a deficient number, since it is larger than the sum of its proper divisors (1).

90156399313 is an equidigital number, since it uses as much as digits as its factorization.

90156399313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 590490, while the sum is 49.

The spelling of 90156399313 in words is "ninety billion, one hundred fifty-six million, three hundred ninety-nine thousand, three hundred thirteen".