2991681924 has 72 divisors (see below), whose sum is σ = 8769036864. Its totient is φ = 777057600.

The previous prime is 2991681919. The next prime is 2991681961. The reversal of 2991681924 is 4291861992.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137007 + ... + 157334.

Almost surely, 2^2991681924 is an apocalyptic number.

It is an amenable number.

2991681924 is an abundant number, since it is smaller than the sum of its proper divisors (5777354940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2991681924 is a wasteful number, since it uses less digits than its factorization.

2991681924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294377 (or 294364 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 2991681924 is about 54696.2697448373. The cubic root of 2991681924 is about 1440.9153651514.

The spelling of 2991681924 in words is "two billion, nine hundred ninety-one million, six hundred eighty-one thousand, nine hundred twenty-four".