2639979461 has 8 divisors (see below), whose sum is σ = 3031420224. Its totient is φ = 2252113920.

The previous prime is 2639979457. The next prime is 2639979469. The reversal of 2639979461 is 1649799362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2639979461 - 2² = 2639979457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2639979397 and 2639979406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639979469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892220 + ... + 895173.

It is an arithmetic number, because the mean of its divisors is an integer number (378927528).

Almost surely, 2^2639979461 is an apocalyptic number.

It is an amenable number.

2639979461 is a deficient number, since it is larger than the sum of its proper divisors (391440763).

2639979461 is a wasteful number, since it uses less digits than its factorization.

2639979461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787611.

The product of its digits is 4408992, while the sum is 56.

The square root of 2639979461 is about 51380.7304443991. The cubic root of 2639979461 is about 1382.0810618217.

The spelling of 2639979461 in words is "two billion, six hundred thirty-nine million, nine hundred seventy-nine thousand, four hundred sixty-one".