2691057988 has 12 divisors (see below), whose sum is σ = 4710641152. Its totient is φ = 1345160520.

The previous prime is 2691057947. The next prime is 2691057997. The reversal of 2691057988 is 8897501962.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75348 + ... + 105163.

Almost surely, 2^2691057988 is an apocalyptic number.

It is an amenable number.

2691057988 is a deficient number, since it is larger than the sum of its proper divisors (2019583164).

2691057988 is a wasteful number, since it uses less digits than its factorization.

2691057988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184242 (or 184240 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 2691057988 is about 51875.4083164653. The cubic root of 2691057988 is about 1390.9377224086.

The spelling of 2691057988 in words is "two billion, six hundred ninety-one million, fifty-seven thousand, nine hundred eighty-eight".