2622615649 has 4 divisors (see below), whose sum is σ = 2622739120. Its totient is φ = 2622492180.

The previous prime is 2622615647. The next prime is 2622615661. The reversal of 2622615649 is 9465162262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2622615649 - 2¹ = 2622615647 is a prime.

It is a super-2 number, since 2×2622615649² = 13756225684759382402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2622615643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20847 + ... + 75364.

It is an arithmetic number, because the mean of its divisors is an integer number (655684780).

Almost surely, 2^2622615649 is an apocalyptic number.

It is an amenable number.

2622615649 is a deficient number, since it is larger than the sum of its proper divisors (123471).

2622615649 is an equidigital number, since it uses as much as digits as its factorization.

2622615649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123470.

The product of its digits is 311040, while the sum is 43.

The square root of 2622615649 is about 51211.4796603262. The cubic root of 2622615649 is about 1379.0442954064.

The spelling of 2622615649 in words is "two billion, six hundred twenty-two million, six hundred fifteen thousand, six hundred forty-nine".