90254773479 has 16 divisors (see below), whose sum is σ = 130542566112. Its totient is φ = 55135984128.

The previous prime is 90254773459. The next prime is 90254773493. The reversal of 90254773479 is 97437745209.

It is a happy number.

It is not a de Polignac number, because 90254773479 - 2⁸ = 90254773223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90254773429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8440734 + ... + 8451419.

It is an arithmetic number, because the mean of its divisors is an integer number (8158910382).

Almost surely, 2^90254773479 is an apocalyptic number.

90254773479 is a deficient number, since it is larger than the sum of its proper divisors (40287792633).

90254773479 is a wasteful number, since it uses less digits than its factorization.

90254773479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16892306.

The product of its (nonzero) digits is 13335840, while the sum is 57.

The spelling of 90254773479 in words is "ninety billion, two hundred fifty-four million, seven hundred seventy-three thousand, four hundred seventy-nine".