2691431140 has 12 divisors (see below), whose sum is σ = 5652005436. Its totient is φ = 1076572448.

The previous prime is 2691431137. The next prime is 2691431147. The reversal of 2691431140 is 411341962.

It can be written as a sum of positive squares in 2 ways, for example, as 1546691584 + 1144739556 = 39328^2 + 33834^2 .

It is not an unprimeable number, because it can be changed into a prime (2691431147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67285759 + ... + 67285798.

It is an arithmetic number, because the mean of its divisors is an integer number (471000453).

Almost surely, 2^2691431140 is an apocalyptic number.

2691431140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2691431140 is an abundant number, since it is smaller than the sum of its proper divisors (2960574296).

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

2691431140 is a wasteful number, since it uses less digits than its factorization.

2691431140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134571566 (or 134571564 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2691431140 is about 51879.0048092675. The cubic root of 2691431140 is about 1391.0020102844.

The spelling of 2691431140 in words is "two billion, six hundred ninety-one million, four hundred thirty-one thousand, one hundred forty".