2697991644 has 24 divisors (see below), whose sum is σ = 6389275648. Its totient is φ = 885907440.

The previous prime is 2697991607. The next prime is 2697991649. The reversal of 2697991644 is 4461997962.

It is a super-2 number, since 2×2697991644² = 14558317822187645472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2697991649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1677052 + ... + 1678659.

Almost surely, 2^2697991644 is an apocalyptic number.

It is an amenable number.

2697991644 is an abundant number, since it is smaller than the sum of its proper divisors (3691284004).

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

2697991644 is a wasteful number, since it uses less digits than its factorization.

2697991644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355785 (or 3355783 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The square root of 2697991644 is about 51942.1952173760. The cubic root of 2697991644 is about 1392.1313065625.

The spelling of 2697991644 in words is "two billion, six hundred ninety-seven million, nine hundred ninety-one thousand, six hundred forty-four".