90187736465 has 8 divisors (see below), whose sum is σ = 110267270568. Its totient is φ = 70788864640.

The previous prime is 90187736453. The next prime is 90187736479. The reversal of 90187736465 is 56463778109.

It can be written as a sum of positive squares in 4 ways, for example, as 11354820481 + 78832915984 = 106559^2 + 280772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90187736465 - 2⁸ = 90187736209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90187736465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170165276 + ... + 170165805.

It is an arithmetic number, because the mean of its divisors is an integer number (13783408821).

Almost surely, 2^90187736465 is an apocalyptic number.

It is an amenable number.

90187736465 is a deficient number, since it is larger than the sum of its proper divisors (20079534103).

90187736465 is a wasteful number, since it uses less digits than its factorization.

90187736465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340331139.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 90187736465 in words is "ninety billion, one hundred eighty-seven million, seven hundred thirty-six thousand, four hundred sixty-five".