90204211769 has 12 divisors (see below), whose sum is σ = 108549756900. Its totient is φ = 74651760288.

The previous prime is 90204211723. The next prime is 90204211771. The reversal of 90204211769 is 96711240209.

It can be written as a sum of positive squares in 2 ways, for example, as 23412978169 + 66791233600 = 153013^2 + 258440^2 .

It is not a de Polignac number, because 90204211769 - 2³⁶ = 21484735033 is a prime.

It is a super-2 number, since 2×90204211769² (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 (90204211469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31738274 + ... + 31741115.

It is an arithmetic number, because the mean of its divisors is an integer number (9045813075).

Almost surely, 2^90204211769 is an apocalyptic number.

It is an amenable number.

90204211769 is a deficient number, since it is larger than the sum of its proper divisors (18345545131).

90204211769 is a wasteful number, since it uses less digits than its factorization.

90204211769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63479432 (or 63479425 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 90204211769 in words is "ninety billion, two hundred four million, two hundred eleven thousand, seven hundred sixty-nine".