90197796225 has 24 divisors (see below), whose sum is σ = 149355476352. Its totient is φ = 48031796800.

The previous prime is 90197796211. The next prime is 90197796229. The reversal of 90197796225 is 52269779109.

It is not a de Polignac number, because 90197796225 - 2¹² = 90197792129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90197796229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 871881 + ... + 969830.

It is an arithmetic number, because the mean of its divisors is an integer number (6223144848).

Almost surely, 2^90197796225 is an apocalyptic number.

It is an amenable number.

90197796225 is a deficient number, since it is larger than the sum of its proper divisors (59157680127).

90197796225 is a wasteful number, since it uses less digits than its factorization.

90197796225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842377 (or 1842372 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 57.

The spelling of 90197796225 in words is "ninety billion, one hundred ninety-seven million, seven hundred ninety-six thousand, two hundred twenty-five".