25656753247397 has 2 divisors, whose sum is σ = 25656753247398. Its totient is φ = 25656753247396.

The previous prime is 25656753247381. The next prime is 25656753247423. The reversal of 25656753247397 is 79374235765652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16506091947361 + 9150661300036 = 4062769^2 + 3025006^2 .

It is a cyclic number.

It is not a de Polignac number, because 25656753247397 - 2⁴ = 25656753247381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25656753247397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25656753247357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828376623698 + 12828376623699.

It is an arithmetic number, because the mean of its divisors is an integer number (12828376623699).

Almost surely, 2^{25656753247397} is an apocalyptic number.

It is an amenable number.

25656753247397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656753247397 is an equidigital number, since it uses as much as digits as its factorization.

25656753247397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376000, while the sum is 71.

The spelling of 25656753247397 in words is "twenty-five trillion, six hundred fifty-six billion, seven hundred fifty-three million, two hundred forty-seven thousand, three hundred ninety-seven".