990151161 has 48 divisors (see below), whose sum is σ = 1439631360. Its totient is φ = 605011680.

The previous prime is 990151139. The next prime is 990151171. The reversal of 990151161 is 161151099.

It is not a de Polignac number, because 990151161 - 2¹⁹ = 989626873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990151171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6074466 + ... + 6074628.

It is an arithmetic number, because the mean of its divisors is an integer number (29992320).

Almost surely, 2^990151161 is an apocalyptic number.

It is an amenable number.

990151161 is a deficient number, since it is larger than the sum of its proper divisors (449480199).

990151161 is a wasteful number, since it uses less digits than its factorization.

990151161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 33.

The square root of 990151161 is about 31466.6674593926. The cubic root of 990151161 is about 996.7062165688.

The spelling of 990151161 in words is "nine hundred ninety million, one hundred fifty-one thousand, one hundred sixty-one".