90255645 has 12 divisors (see below), whose sum is σ = 156443196. Its totient is φ = 48136320.

The previous prime is 90255631. The next prime is 90255653. The reversal of 90255645 is 54655209.

90255645 is a `hidden beast` number, since 9 + 0 + 2 + 5 + 5 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 70913241 + 19342404 = 8421^2 + 4398^2 .

It is not a de Polignac number, because 90255645 - 2⁴ = 90255629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1002796 + ... + 1002885.

It is an arithmetic number, because the mean of its divisors is an integer number (13036933).

Almost surely, 2^90255645 is an apocalyptic number.

It is an amenable number.

90255645 is a deficient number, since it is larger than the sum of its proper divisors (66187551).

90255645 is a wasteful number, since it uses less digits than its factorization.

90255645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005692 (or 2005689 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 90255645 is about 9500.2971006174. The cubic root of 90255645 is about 448.5643878730.

The spelling of 90255645 in words is "ninety million, two hundred fifty-five thousand, six hundred forty-five".