2656601615 has 4 divisors (see below), whose sum is σ = 3187921944. Its totient is φ = 2125281288.

The previous prime is 2656601593. The next prime is 2656601677. The reversal of 2656601615 is 5161066562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2656601615 - 2¹⁶ = 2656536079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265660157 + ... + 265660166.

It is an arithmetic number, because the mean of its divisors is an integer number (796980486).

Almost surely, 2^2656601615 is an apocalyptic number.

2656601615 is a deficient number, since it is larger than the sum of its proper divisors (531320329).

2656601615 is an equidigital number, since it uses as much as digits as its factorization.

2656601615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531320328.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2656601615 is about 51542.2313738938. The cubic root of 2656601615 is about 1384.9756697885.

The spelling of 2656601615 in words is "two billion, six hundred fifty-six million, six hundred one thousand, six hundred fifteen".