25277555497 has 2 divisors, whose sum is σ = 25277555498. Its totient is φ = 25277555496.

The previous prime is 25277555411. The next prime is 25277555531. The reversal of 25277555497 is 79455577252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24643976256 + 633579241 = 156984^2 + 25171^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25277555497 is a prime.

It is not a weakly prime, because it can be changed into another prime (25277535497) 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, 12638777748 + 12638777749.

It is an arithmetic number, because the mean of its divisors is an integer number (12638777749).

Almost surely, 2^25277555497 is an apocalyptic number.

It is an amenable number.

25277555497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277555497 is an equidigital number, since it uses as much as digits as its factorization.

25277555497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30870000, while the sum is 58.

The spelling of 25277555497 in words is "twenty-five billion, two hundred seventy-seven million, five hundred fifty-five thousand, four hundred ninety-seven".