2631642347 has 4 divisors (see below), whose sum is σ = 2786444856. Its totient is φ = 2476839840.

The previous prime is 2631642331. The next prime is 2631642379. The reversal of 2631642347 is 7432461362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2631642347 - 2⁴ = 2631642331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2631642347.

It is not an unprimeable number, because it can be changed into a prime (2631642397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77401229 + ... + 77401262.

It is an arithmetic number, because the mean of its divisors is an integer number (696611214).

Almost surely, 2^2631642347 is an apocalyptic number.

2631642347 is a deficient number, since it is larger than the sum of its proper divisors (154802509).

2631642347 is a wasteful number, since it uses less digits than its factorization.

2631642347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154802508.

The product of its digits is 145152, while the sum is 38.

The square root of 2631642347 is about 51299.5355437064. The cubic root of 2631642347 is about 1380.6246466773.

The spelling of 2631642347 in words is "two billion, six hundred thirty-one million, six hundred forty-two thousand, three hundred forty-seven".