90061579481 has 4 divisors (see below), whose sum is σ = 93977300352. Its totient is φ = 86145858612.

The previous prime is 90061579459. The next prime is 90061579511. The reversal of 90061579481 is 18497516009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90061579481 - 2²⁶ = 89994470617 is a prime.

It is a super-2 number, since 2×90061579481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90061579981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1957860401 + ... + 1957860446.

It is an arithmetic number, because the mean of its divisors is an integer number (23494325088).

Almost surely, 2^90061579481 is an apocalyptic number.

It is an amenable number.

90061579481 is a deficient number, since it is larger than the sum of its proper divisors (3915720871).

90061579481 is a wasteful number, since it uses less digits than its factorization.

90061579481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915720870.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 90061579481 in words is "ninety billion, sixty-one million, five hundred seventy-nine thousand, four hundred eighty-one".