2653656631681 has 4 divisors (see below), whose sum is σ = 2894898143664. Its totient is φ = 2412415119700.

The previous prime is 2653656631679. The next prime is 2653656631687. The reversal of 2653656631681 is 1861366563562.

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.

It is a cyclic number.

It is not a de Polignac number, because 2653656631681 - 2¹ = 2653656631679 is a prime.

It is a super-2 number, since 2×2653656631681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2653656631687) 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, 120620755975 + ... + 120620755996.

It is an arithmetic number, because the mean of its divisors is an integer number (723724535916).

Almost surely, 2^{2653656631681} is an apocalyptic number.

It is an amenable number.

2653656631681 is a deficient number, since it is larger than the sum of its proper divisors (241241511983).

2653656631681 is a wasteful number, since it uses less digits than its factorization.

2653656631681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241241511982.

The product of its digits is 27993600, while the sum is 58.

The spelling of 2653656631681 in words is "two trillion, six hundred fifty-three billion, six hundred fifty-six million, six hundred thirty-one thousand, six hundred eighty-one".