90756919691 has 2 divisors, whose sum is σ = 90756919692. Its totient is φ = 90756919690.

The previous prime is 90756919657. The next prime is 90756919699. The reversal of 90756919691 is 19691965709.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90756919691 is a prime.

It is not a weakly prime, because it can be changed into another prime (90756919699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45378459845 + 45378459846.

It is an arithmetic number, because the mean of its divisors is an integer number (45378459846).

Almost surely, 2^90756919691 is an apocalyptic number.

90756919691 is a deficient number, since it is larger than the sum of its proper divisors (1).

90756919691 is an equidigital number, since it uses as much as digits as its factorization.

90756919691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8266860, while the sum is 62.

The spelling of 90756919691 in words is "ninety billion, seven hundred fifty-six million, nine hundred nineteen thousand, six hundred ninety-one".