90025883865 has 80 divisors (see below), whose sum is σ = 167176049040. Its totient is φ = 46315653120.

The previous prime is 90025883863. The next prime is 90025883873. The reversal of 90025883865 is 56838852009.

90025883865 is a `hidden beast` number, since 9 + 0 + 0 + 258 + 8 + 386 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 42651749529 + 47374134336 = 206523^2 + 217656^2 .

It is not a de Polignac number, because 90025883865 - 2¹ = 90025883863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90025883863) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1447387 + ... + 1508303.

It is an arithmetic number, because the mean of its divisors is an integer number (2089700613).

Almost surely, 2^90025883865 is an apocalyptic number.

It is an amenable number.

90025883865 is a deficient number, since it is larger than the sum of its proper divisors (77150165175).

90025883865 is a wasteful number, since it uses less digits than its factorization.

90025883865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61064 (or 61055 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 90025883865 in words is "ninety billion, twenty-five million, eight hundred eighty-three thousand, eight hundred sixty-five".