990501860085 has 8 divisors (see below), whose sum is σ = 1584802976160. Its totient is φ = 528267658704.

The previous prime is 990501860081. The next prime is 990501860099. The reversal of 990501860085 is 580068105099.

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

It is not a de Polignac number, because 990501860085 - 2² = 990501860081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990501860081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33016728655 + ... + 33016728684.

It is an arithmetic number, because the mean of its divisors is an integer number (198100372020).

Almost surely, 2^990501860085 is an apocalyptic number.

It is an amenable number.

990501860085 is a deficient number, since it is larger than the sum of its proper divisors (594301116075).

990501860085 is a wasteful number, since it uses less digits than its factorization.

990501860085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66033457347.

The product of its (nonzero) digits is 777600, while the sum is 51.

The spelling of 990501860085 in words is "nine hundred ninety billion, five hundred one million, eight hundred sixty thousand, eighty-five".