2656501641 has 6 divisors (see below), whose sum is σ = 3837169050. Its totient is φ = 1771001088.

The previous prime is 2656501607. The next prime is 2656501649. The reversal of 2656501641 is 1461056562.

2656501641 is a `hidden beast` number, since 2 + 6 + 5 + 6 + 5 + 0 + 1 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1872725625 + 783776016 = 43275^2 + 27996^2 .

It is not a de Polignac number, because 2656501641 - 2⁷ = 2656501513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2656501596 and 2656501605.

It is not an unprimeable number, because it can be changed into a prime (2656501649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147583416 + ... + 147583433.

It is an arithmetic number, because the mean of its divisors is an integer number (639528175).

Almost surely, 2^2656501641 is an apocalyptic number.

It is an amenable number.

2656501641 is a deficient number, since it is larger than the sum of its proper divisors (1180667409).

2656501641 is a wasteful number, since it uses less digits than its factorization.

2656501641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295166855 (or 295166852 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 2656501641 is about 51541.2615386934. The cubic root of 2656501641 is about 1384.9582963023.

The spelling of 2656501641 in words is "two billion, six hundred fifty-six million, five hundred one thousand, six hundred forty-one".