25277555257 has 2 divisors, whose sum is σ = 25277555258. Its totient is φ = 25277555256.

The previous prime is 25277555249. The next prime is 25277555269. The reversal of 25277555257 is 75255577252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21849569856 + 3427985401 = 147816^2 + 58549^2 .

It is a cyclic number.

It is not a de Polignac number, because 25277555257 - 2³ = 25277555249 is a prime.

It is not a weakly prime, because it can be changed into another prime (25277555207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12638777628 + 12638777629.

It is an arithmetic number, because the mean of its divisors is an integer number (12638777629).

Almost surely, 2^25277555257 is an apocalyptic number.

It is an amenable number.

25277555257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277555257 is an equidigital number, since it uses as much as digits as its factorization.

25277555257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8575000, while the sum is 52.

The spelling of 25277555257 in words is "twenty-five billion, two hundred seventy-seven million, five hundred fifty-five thousand, two hundred fifty-seven".