2681634621 has 16 divisors (see below), whose sum is σ = 3807000000. Its totient is φ = 1673188608.

The previous prime is 2681634617. The next prime is 2681634629. The reversal of 2681634621 is 1264361862.

It is not a de Polignac number, because 2681634621 - 2² = 2681634617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2681634621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681634629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137746 + ... + 156003.

It is an arithmetic number, because the mean of its divisors is an integer number (237937500).

Almost surely, 2^2681634621 is an apocalyptic number.

It is an amenable number.

2681634621 is a deficient number, since it is larger than the sum of its proper divisors (1125365379).

2681634621 is a wasteful number, since it uses less digits than its factorization.

2681634621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293948.

The product of its digits is 82944, while the sum is 39.

The square root of 2681634621 is about 51784.5017452133. The cubic root of 2681634621 is about 1389.3122593670.

The spelling of 2681634621 in words is "two billion, six hundred eighty-one million, six hundred thirty-four thousand, six hundred twenty-one".