2656265642 has 4 divisors (see below), whose sum is σ = 3984398466. Its totient is φ = 1328132820.

The previous prime is 2656265621. The next prime is 2656265663. The reversal of 2656265642 is 2465626562.

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

It is an interprime number because it is at equal distance from previous prime (2656265621) and next prime (2656265663).

It can be written as a sum of positive squares in only one way, i.e., 2023290361 + 632975281 = 44981^2 + 25159^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2656265593 and 2656265602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664066409 + ... + 664066412.

Almost surely, 2^2656265642 is an apocalyptic number.

2656265642 is a deficient number, since it is larger than the sum of its proper divisors (1328132824).

2656265642 is a wasteful number, since it uses less digits than its factorization.

2656265642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328132823.

The product of its digits is 1036800, while the sum is 44.

The square root of 2656265642 is about 51538.9720696872. The cubic root of 2656265642 is about 1384.9172826565.

The spelling of 2656265642 in words is "two billion, six hundred fifty-six million, two hundred sixty-five thousand, six hundred forty-two".