2656247764607 has 4 divisors (see below), whose sum is σ = 2656384162776. Its totient is φ = 2656111366440.

The previous prime is 2656247764553. The next prime is 2656247764633. The reversal of 2656247764607 is 7064677426562.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2656247764607 - 2¹⁸ = 2656247502463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2656247764607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656247764697) 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, 68169869 + ... + 68208822.

It is an arithmetic number, because the mean of its divisors is an integer number (664096040694).

Almost surely, 2^{2656247764607} is an apocalyptic number.

2656247764607 is a deficient number, since it is larger than the sum of its proper divisors (136398169).

2656247764607 is a wasteful number, since it uses less digits than its factorization.

2656247764607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136398168.

The product of its (nonzero) digits is 142248960, while the sum is 62.

The spelling of 2656247764607 in words is "two trillion, six hundred fifty-six billion, two hundred forty-seven million, seven hundred sixty-four thousand, six hundred seven".