2653815661 has 16 divisors (see below), whose sum is σ = 3119800320. Its totient is φ = 2210246640.

The previous prime is 2653815653. The next prime is 2653815673. The reversal of 2653815661 is 1665183562.

2653815661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2653815661 - 2³ = 2653815653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2653815611) 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, 16716 + ... + 74746.

It is an arithmetic number, because the mean of its divisors is an integer number (194987520).

Almost surely, 2^2653815661 is an apocalyptic number.

It is an amenable number.

2653815661 is a deficient number, since it is larger than the sum of its proper divisors (465984659).

2653815661 is a wasteful number, since it uses less digits than its factorization.

2653815661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58224.

The product of its digits is 259200, while the sum is 43.

The square root of 2653815661 is about 51515.1983496133. The cubic root of 2653815661 is about 1384.4913633153.

The spelling of 2653815661 in words is "two billion, six hundred fifty-three million, eight hundred fifteen thousand, six hundred sixty-one".