2691890456 has 64 divisors (see below), whose sum is σ = 5295386880. Its totient is φ = 1281392640.

The previous prime is 2691890447. The next prime is 2691890501. The reversal of 2691890456 is 6540981962.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7625576 + ... + 7625928.

It is an arithmetic number, because the mean of its divisors is an integer number (82740420).

Almost surely, 2^2691890456 is an apocalyptic number.

It is an amenable number.

2691890456 is a deficient number, since it is larger than the sum of its proper divisors (2603496424).

2691890456 is a wasteful number, since it uses less digits than its factorization.

2691890456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 2691890456 is about 51883.4314208303. The cubic root of 2691890456 is about 1391.0811346244.

The spelling of 2691890456 in words is "two billion, six hundred ninety-one million, eight hundred ninety thousand, four hundred fifty-six".