2991673648 has 20 divisors (see below), whose sum is σ = 5838072520. Its totient is φ = 1485074304.

The previous prime is 2991673621. The next prime is 2991673661. The reversal of 2991673648 is 8463761992.

It is a super-2 number, since 2×2991673648² = 17900222432275255808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670365 + ... + 674812.

It is an arithmetic number, because the mean of its divisors is an integer number (291903626).

Almost surely, 2^2991673648 is an apocalyptic number.

It is an amenable number.

2991673648 is a deficient number, since it is larger than the sum of its proper divisors (2846398872).

2991673648 is a wasteful number, since it uses less digits than its factorization.

2991673648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345324 (or 1345318 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 55.

The square root of 2991673648 is about 54696.1940906312. The cubic root of 2991673648 is about 1440.9140364644.

The spelling of 2991673648 in words is "two billion, nine hundred ninety-one million, six hundred seventy-three thousand, six hundred forty-eight".