2649686761 has 8 divisors (see below), whose sum is σ = 2757876480. Its totient is φ = 2542618512.

The previous prime is 2649686747. The next prime is 2649686807. The reversal of 2649686761 is 1676869462.

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

It is a cyclic number.

It is not a de Polignac number, because 2649686761 - 2¹³ = 2649678569 is a prime.

It is a super-2 number, since 2×2649686761² = 14041679862837342242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649786761) 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, 275545 + ... + 284998.

It is an arithmetic number, because the mean of its divisors is an integer number (344734560).

Almost surely, 2^2649686761 is an apocalyptic number.

It is an amenable number.

2649686761 is a deficient number, since it is larger than the sum of its proper divisors (108189719).

2649686761 is a wasteful number, since it uses less digits than its factorization.

2649686761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560735.

The product of its digits is 5225472, while the sum is 55.

The square root of 2649686761 is about 51475.1081689004. The cubic root of 2649686761 is about 1383.7729771258.

The spelling of 2649686761 in words is "two billion, six hundred forty-nine million, six hundred eighty-six thousand, seven hundred sixty-one".