90870118785 has 32 divisors (see below), whose sum is σ = 171049639680. Its totient is φ = 45613234944.

The previous prime is 90870118769. The next prime is 90870118841. The reversal of 90870118785 is 58781107809.

It is not a de Polignac number, because 90870118785 - 2⁴ = 90870118769 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19795117 + ... + 19799706.

It is an arithmetic number, because the mean of its divisors is an integer number (5345301240).

Almost surely, 2^90870118785 is an apocalyptic number.

It is an amenable number.

90870118785 is a deficient number, since it is larger than the sum of its proper divisors (80179520895).

90870118785 is a wasteful number, since it uses less digits than its factorization.

90870118785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39594854 (or 39594848 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The spelling of 90870118785 in words is "ninety billion, eight hundred seventy million, one hundred eighteen thousand, seven hundred eighty-five".