2680642639 has 16 divisors (see below), whose sum is σ = 2783613600. Its totient is φ = 2579814016.

The previous prime is 2680642609. The next prime is 2680642669. The reversal of 2680642639 is 9362460862.

It is an interprime number because it is at equal distance from previous prime (2680642609) and next prime (2680642669).

It is a cyclic number.

It is not a de Polignac number, because 2680642639 - 2⁷ = 2680642511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2680642609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416617 + ... + 2417725.

It is an arithmetic number, because the mean of its divisors is an integer number (173975850).

Almost surely, 2^2680642639 is an apocalyptic number.

2680642639 is a deficient number, since it is larger than the sum of its proper divisors (102970961).

2680642639 is a wasteful number, since it uses less digits than its factorization.

2680642639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 2680642639 is about 51774.9228777794. The cubic root of 2680642639 is about 1389.1409282052.

The spelling of 2680642639 in words is "two billion, six hundred eighty million, six hundred forty-two thousand, six hundred thirty-nine".