90750227905 has 4 divisors (see below), whose sum is σ = 108900273492. Its totient is φ = 72600182320.

The previous prime is 90750227899. The next prime is 90750227929. The reversal of 90750227905 is 50972205709.

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

It can be written as a sum of positive squares in 2 ways, for example, as 70989740721 + 19760487184 = 266439^2 + 140572^2 .

It is not a de Polignac number, because 90750227905 - 2⁵ = 90750227873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9075022786 + ... + 9075022795.

It is an arithmetic number, because the mean of its divisors is an integer number (27225068373).

Almost surely, 2^90750227905 is an apocalyptic number.

It is an amenable number.

90750227905 is a deficient number, since it is larger than the sum of its proper divisors (18150045587).

90750227905 is a wasteful number, since it uses less digits than its factorization.

90750227905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18150045586.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 90750227905 in words is "ninety billion, seven hundred fifty million, two hundred twenty-seven thousand, nine hundred five".