2656643141 has 4 divisors (see below), whose sum is σ = 2660853984. Its totient is φ = 2652432300.

The previous prime is 2656643131. The next prime is 2656643153. The reversal of 2656643141 is 1413466562.

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 a de Polignac number, because none of the positive numbers 2^k-2656643141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656643095 and 2656643104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656643111) 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, 2104475 + ... + 2105736.

It is an arithmetic number, because the mean of its divisors is an integer number (665213496).

Almost surely, 2^2656643141 is an apocalyptic number.

It is an amenable number.

2656643141 is a deficient number, since it is larger than the sum of its proper divisors (4210843).

2656643141 is an equidigital number, since it uses as much as digits as its factorization.

2656643141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210842.

The product of its digits is 103680, while the sum is 38.

The square root of 2656643141 is about 51542.6342070329. The cubic root of 2656643141 is about 1384.9828860506.

The spelling of 2656643141 in words is "two billion, six hundred fifty-six million, six hundred forty-three thousand, one hundred forty-one".