90897161895 has 12 divisors (see below), whose sum is σ = 157555080696. Its totient is φ = 48478486320.

The previous prime is 90897161893. The next prime is 90897161939. The reversal of 90897161895 is 59816179809.

90897161895 is a `hidden beast` number, since 9 + 0 + 8 + 9 + 7 + 1 + 618 + 9 + 5 = 666.

It is not a de Polignac number, because 90897161895 - 2¹ = 90897161893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897161893) 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, 1009968421 + ... + 1009968510.

It is an arithmetic number, because the mean of its divisors is an integer number (13129590058).

Almost surely, 2^90897161895 is an apocalyptic number.

90897161895 is a deficient number, since it is larger than the sum of its proper divisors (66657918801).

90897161895 is a wasteful number, since it uses less digits than its factorization.

90897161895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019936942 (or 2019936939 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 90897161895 in words is "ninety billion, eight hundred ninety-seven million, one hundred sixty-one thousand, eight hundred ninety-five".