90161511 has 16 divisors (see below), whose sum is σ = 131666688. Its totient is φ = 54425600.

The previous prime is 90161509. The next prime is 90161521. The reversal of 90161511 is 11516109.

It is a cyclic number.

It is not a de Polignac number, because 90161511 - 2¹ = 90161509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90161521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3166 + ... + 13796.

It is an arithmetic number, because the mean of its divisors is an integer number (8229168).

Almost surely, 2^90161511 is an apocalyptic number.

90161511 is a deficient number, since it is larger than the sum of its proper divisors (41505177).

90161511 is a wasteful number, since it uses less digits than its factorization.

90161511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10902.

The product of its (nonzero) digits is 270, while the sum is 24.

The square root of 90161511 is about 9495.3415420405. The cubic root of 90161511 is about 448.4083871099.

The spelling of 90161511 in words is "ninety million, one hundred sixty-one thousand, five hundred eleven".