90494746591 has 2 divisors, whose sum is σ = 90494746592. Its totient is φ = 90494746590.

The previous prime is 90494746583. The next prime is 90494746637. The reversal of 90494746591 is 19564749409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90494746591 - 2³ = 90494746583 is a prime.

It is a super-2 number, since 2×90494746591² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90494746571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45247373295 + 45247373296.

It is an arithmetic number, because the mean of its divisors is an integer number (45247373296).

Almost surely, 2^90494746591 is an apocalyptic number.

90494746591 is a deficient number, since it is larger than the sum of its proper divisors (1).

90494746591 is an equidigital number, since it uses as much as digits as its factorization.

90494746591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 90494746591 in words is "ninety billion, four hundred ninety-four million, seven hundred forty-six thousand, five hundred ninety-one".