90211513772 has 12 divisors (see below), whose sum is σ = 160545914760. Its totient is φ = 44341252416.

The previous prime is 90211513757. The next prime is 90211513781. The reversal of 90211513772 is 27731511209.

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, 191125853 + ... + 191126324.

It is an arithmetic number, because the mean of its divisors is an integer number (13378826230).

Almost surely, 2^90211513772 is an apocalyptic number.

It is an amenable number.

90211513772 is a deficient number, since it is larger than the sum of its proper divisors (70334400988).

90211513772 is a wasteful number, since it uses less digits than its factorization.

90211513772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382252240 (or 382252238 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 38.

The spelling of 90211513772 in words is "ninety billion, two hundred eleven million, five hundred thirteen thousand, seven hundred seventy-two".