90708899645 has 32 divisors (see below), whose sum is σ = 133990536960. Its totient is φ = 57406970880.

The previous prime is 90708899579. The next prime is 90708899657. The reversal of 90708899645 is 54699880709.

It is not a de Polignac number, because 90708899645 - 2¹⁶ = 90708834109 is a prime.

It is a super-2 number, since 2×90708899645² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4321586 + ... + 4342524.

It is an arithmetic number, because the mean of its divisors is an integer number (4187204280).

Almost surely, 2^90708899645 is an apocalyptic number.

It is an amenable number.

90708899645 is a deficient number, since it is larger than the sum of its proper divisors (43281637315).

90708899645 is a wasteful number, since it uses less digits than its factorization.

90708899645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30485.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The spelling of 90708899645 in words is "ninety billion, seven hundred eight million, eight hundred ninety-nine thousand, six hundred forty-five".