2656651123573 has 2 divisors, whose sum is σ = 2656651123574. Its totient is φ = 2656651123572.

The previous prime is 2656651123559. The next prime is 2656651123627. The reversal of 2656651123573 is 3753211566562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1433187276964 + 1223463846609 = 1197158^2 + 1106103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2656651123573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2656651123573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656651123073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328325561786 + 1328325561787.

It is an arithmetic number, because the mean of its divisors is an integer number (1328325561787).

Almost surely, 2^{2656651123573} is an apocalyptic number.

It is an amenable number.

2656651123573 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656651123573 is an equidigital number, since it uses as much as digits as its factorization.

2656651123573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804000, while the sum is 52.

The spelling of 2656651123573 in words is "two trillion, six hundred fifty-six billion, six hundred fifty-one million, one hundred twenty-three thousand, five hundred seventy-three".