2656645373 has 2 divisors, whose sum is σ = 2656645374. Its totient is φ = 2656645372.

The previous prime is 2656645363. The next prime is 2656645391. The reversal of 2656645373 is 3735466562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2414936164 + 241709209 = 49142^2 + 15547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656645373 - 2²⁴ = 2639868157 is a prime.

It is a super-3 number, since 3×2656645373³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656645363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328322686 + 1328322687.

It is an arithmetic number, because the mean of its divisors is an integer number (1328322687).

Almost surely, 2^2656645373 is an apocalyptic number.

It is an amenable number.

2656645373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656645373 is an equidigital number, since it uses as much as digits as its factorization.

2656645373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 47.

The square root of 2656645373 is about 51542.6558590067. The cubic root of 2656645373 is about 1384.9832739186.

The spelling of 2656645373 in words is "two billion, six hundred fifty-six million, six hundred forty-five thousand, three hundred seventy-three".