90436762057 has 2 divisors, whose sum is σ = 90436762058. Its totient is φ = 90436762056.

The previous prime is 90436761949. The next prime is 90436762067. The reversal of 90436762057 is 75026763409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77408594176 + 13028167881 = 278224^2 + 114141^2 .

It is a cyclic number.

It is not a de Polignac number, because 90436762057 - 2¹⁹ = 90436237769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90436762057.

It is not a weakly prime, because it can be changed into another prime (90436762067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218381028 + 45218381029.

It is an arithmetic number, because the mean of its divisors is an integer number (45218381029).

Almost surely, 2^90436762057 is an apocalyptic number.

It is an amenable number.

90436762057 is a deficient number, since it is larger than the sum of its proper divisors (1).

90436762057 is an equidigital number, since it uses as much as digits as its factorization.

90436762057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 90436762057 in words is "ninety billion, four hundred thirty-six million, seven hundred sixty-two thousand, fifty-seven".