90424681457 has 6 divisors (see below), whose sum is σ = 99392418594. Its totient is φ = 82204255760.

The previous prime is 90424681387. The next prime is 90424681463. The reversal of 90424681457 is 75418642409.

It can be written as a sum of positive squares in only one way, i.e., 88968572176 + 1456109281 = 298276^2 + 38159^2 .

It is not a de Polignac number, because 90424681457 - 2⁸ = 90424681201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90424681157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 373655588 + ... + 373655829.

It is an arithmetic number, because the mean of its divisors is an integer number (16565403099).

Almost surely, 2^90424681457 is an apocalyptic number.

It is an amenable number.

90424681457 is a deficient number, since it is larger than the sum of its proper divisors (8967737137).

90424681457 is a wasteful number, since it uses less digits than its factorization.

90424681457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747311439 (or 747311428 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 90424681457 in words is "ninety billion, four hundred twenty-four million, six hundred eighty-one thousand, four hundred fifty-seven".