2679756749 has 16 divisors (see below), whose sum is σ = 2816311680. Its totient is φ = 2544949440.

The previous prime is 2679756743. The next prime is 2679756773. The reversal of 2679756749 is 9476579762.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2679756749 is a prime.

It is a super-2 number, since 2×2679756749² = 14362192467622098002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2679756691 and 2679756700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2679756743) 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, 2455694 + ... + 2456784.

It is an arithmetic number, because the mean of its divisors is an integer number (176019480).

Almost surely, 2^2679756749 is an apocalyptic number.

It is an amenable number.

2679756749 is a deficient number, since it is larger than the sum of its proper divisors (136554931).

2679756749 is a wasteful number, since it uses less digits than its factorization.

2679756749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780.

The product of its digits is 40007520, while the sum is 62.

The square root of 2679756749 is about 51766.3669673660. The cubic root of 2679756749 is about 1388.9878850968.

The spelling of 2679756749 in words is "two billion, six hundred seventy-nine million, seven hundred fifty-six thousand, seven hundred forty-nine".