2545610657 has 2 divisors, whose sum is σ = 2545610658. Its totient is φ = 2545610656.

The previous prime is 2545610623. The next prime is 2545610713. The reversal of 2545610657 is 7560165452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1530296161 + 1015314496 = 39119^2 + 31864^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545610657 - 2¹⁸ = 2545348513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2545610257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272805328 + 1272805329.

It is an arithmetic number, because the mean of its divisors is an integer number (1272805329).

Almost surely, 2^2545610657 is an apocalyptic number.

It is an amenable number.

2545610657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545610657 is an equidigital number, since it uses as much as digits as its factorization.

2545610657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 2545610657 is about 50454.0450013673. The cubic root of 2545610657 is about 1365.4128744291.

The spelling of 2545610657 in words is "two billion, five hundred forty-five million, six hundred ten thousand, six hundred fifty-seven".