990472665331 has 4 divisors (see below), whose sum is σ = 1024626895200. Its totient is φ = 956318435464.

The previous prime is 990472665293. The next prime is 990472665361. The reversal of 990472665331 is 133566274099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990472665331 - 2³³ = 981882730739 is a prime.

It is a super-2 number, since 2×990472665331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990472665361) 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 3 ways as a sum of consecutive naturals, for example, 17077114891 + ... + 17077114948.

It is an arithmetic number, because the mean of its divisors is an integer number (256156723800).

Almost surely, 2^990472665331 is an apocalyptic number.

990472665331 is a deficient number, since it is larger than the sum of its proper divisors (34154229869).

990472665331 is a wasteful number, since it uses less digits than its factorization.

990472665331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34154229868.

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 990472665331 in words is "nine hundred ninety billion, four hundred seventy-two million, six hundred sixty-five thousand, three hundred thirty-one".