90911937166 has 4 divisors (see below), whose sum is σ = 136367905752. Its totient is φ = 45455968582.

The previous prime is 90911937113. The next prime is 90911937167. The reversal of 90911937166 is 66173911909.

It is a happy number.

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

It is a super-2 number, since 2×90911937166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90911937167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22727984290 + ... + 22727984293.

It is an arithmetic number, because the mean of its divisors is an integer number (34091976438).

Almost surely, 2^90911937166 is an apocalyptic number.

90911937166 is a deficient number, since it is larger than the sum of its proper divisors (45455968586).

90911937166 is a wasteful number, since it uses less digits than its factorization.

90911937166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45455968585.

The product of its (nonzero) digits is 551124, while the sum is 52.

The spelling of 90911937166 in words is "ninety billion, nine hundred eleven million, nine hundred thirty-seven thousand, one hundred sixty-six".