90773521679 has 2 divisors, whose sum is σ = 90773521680. Its totient is φ = 90773521678.

The previous prime is 90773521669. The next prime is 90773521693. The reversal of 90773521679 is 97612537709.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90773521679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90773521609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45386760839 + 45386760840.

It is an arithmetic number, because the mean of its divisors is an integer number (45386760840).

Almost surely, 2^90773521679 is an apocalyptic number.

90773521679 is a deficient number, since it is larger than the sum of its proper divisors (1).

90773521679 is an equidigital number, since it uses as much as digits as its factorization.

90773521679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 90773521679 in words is "ninety billion, seven hundred seventy-three million, five hundred twenty-one thousand, six hundred seventy-nine".