90977905558 has 4 divisors (see below), whose sum is σ = 136466858340. Its totient is φ = 45488952778.

The previous prime is 90977905549. The next prime is 90977905559. The reversal of 90977905558 is 85550977909.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×90977905558³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90977905558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90977905559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22744476388 + ... + 22744476391.

It is an arithmetic number, because the mean of its divisors is an integer number (34116714585).

Almost surely, 2^90977905558 is an apocalyptic number.

90977905558 is a deficient number, since it is larger than the sum of its proper divisors (45488952782).

90977905558 is a wasteful number, since it uses less digits than its factorization.

90977905558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45488952781.

The product of its (nonzero) digits is 35721000, while the sum is 64.

The spelling of 90977905558 in words is "ninety billion, nine hundred seventy-seven million, nine hundred five thousand, five hundred fifty-eight".