2642679649 has 3 divisors (see below), whose sum is σ = 2642731057. Its totient is φ = 2642628242.

The previous prime is 2642679623. The next prime is 2642679659. The reversal of 2642679649 is 9469762462.

The square root of 2642679649 is 51407.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2642679649 - 2⁵ = 2642679617 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 2642679649.

It is not an unprimeable number, because it can be changed into a prime (2642679659) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 25704 + ... + 77110.

Almost surely, 2^2642679649 is an apocalyptic number.

2642679649 is the 51407-th square number.

2642679649 is the 25704-th centered octagonal number.

It is an amenable number.

2642679649 is a deficient number, since it is larger than the sum of its proper divisors (51408).

2642679649 is an frugal number, since it uses more digits than its factorization.

2642679649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102814 (or 51407 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The cubic root of 2642679649 is about 1382.5521017352.

The spelling of 2642679649 in words is "two billion, six hundred forty-two million, six hundred seventy-nine thousand, six hundred forty-nine".