90888357521 has 8 divisors (see below), whose sum is σ = 97909848960. Its totient is φ = 83871163152.

The previous prime is 90888357493. The next prime is 90888357533. The reversal of 90888357521 is 12575388809.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90888357521 - 2²⁶ = 90821248657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90888357121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1030265 + ... + 1114998.

It is an arithmetic number, because the mean of its divisors is an integer number (12238731120).

Almost surely, 2^90888357521 is an apocalyptic number.

It is an amenable number.

90888357521 is a deficient number, since it is larger than the sum of its proper divisors (7021491439).

90888357521 is a wasteful number, since it uses less digits than its factorization.

90888357521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148535.

The product of its (nonzero) digits is 4838400, while the sum is 56.

The spelling of 90888357521 in words is "ninety billion, eight hundred eighty-eight million, three hundred fifty-seven thousand, five hundred twenty-one".