2557298693 has 2 divisors, whose sum is σ = 2557298694. Its totient is φ = 2557298692.

The previous prime is 2557298683. The next prime is 2557298701. The reversal of 2557298693 is 3968927552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2552068324 + 5230369 = 50518^2 + 2287^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557298693 - 2⁸ = 2557298437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557298683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278649346 + 1278649347.

It is an arithmetic number, because the mean of its divisors is an integer number (1278649347).

Almost surely, 2^2557298693 is an apocalyptic number.

It is an amenable number.

2557298693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557298693 is an equidigital number, since it uses as much as digits as its factorization.

2557298693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8164800, while the sum is 56.

The square root of 2557298693 is about 50569.7408832594. The cubic root of 2557298693 is about 1367.4994244600.

The spelling of 2557298693 in words is "two billion, five hundred fifty-seven million, two hundred ninety-eight thousand, six hundred ninety-three".