90993615591 has 8 divisors (see below), whose sum is σ = 128461575024. Its totient is φ = 57094033280.

The previous prime is 90993615511. The next prime is 90993615631. The reversal of 90993615591 is 19551639909.

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 90993615591 - 2⁷ = 90993615463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90993615511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892094220 + ... + 892094321.

It is an arithmetic number, because the mean of its divisors is an integer number (16057696878).

Almost surely, 2^90993615591 is an apocalyptic number.

90993615591 is a deficient number, since it is larger than the sum of its proper divisors (37467959433).

90993615591 is a wasteful number, since it uses less digits than its factorization.

90993615591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784188561.

The product of its (nonzero) digits is 2952450, while the sum is 57.

The spelling of 90993615591 in words is "ninety billion, nine hundred ninety-three million, six hundred fifteen thousand, five hundred ninety-one".