2646556657323 has 16 divisors (see below), whose sum is σ = 3589501910400. Its totient is φ = 1734007096640.

The previous prime is 2646556657253. The next prime is 2646556657343. The reversal of 2646556657323 is 3237566556462.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2646556657323 - 2²⁶ = 2646489548459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2646556657343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309458 + ... + 2647223.

It is an arithmetic number, because the mean of its divisors is an integer number (224343869400).

Almost surely, 2^{2646556657323} is an apocalyptic number.

2646556657323 is a deficient number, since it is larger than the sum of its proper divisors (942945253077).

2646556657323 is a wasteful number, since it uses less digits than its factorization.

2646556657323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960522.

The product of its digits is 163296000, while the sum is 60.

The spelling of 2646556657323 in words is "two trillion, six hundred forty-six billion, five hundred fifty-six million, six hundred fifty-seven thousand, three hundred twenty-three".