25226242605857 has 2 divisors, whose sum is σ = 25226242605858. Its totient is φ = 25226242605856.

The previous prime is 25226242605803. The next prime is 25226242605887. The reversal of 25226242605857 is 75850624262252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24524373979681 + 701868626176 = 4952209^2 + 837776^2 .

It is a cyclic number.

It is not a de Polignac number, because 25226242605857 - 2²² = 25226238411553 is a prime.

It is not a weakly prime, because it can be changed into another prime (25226242605887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12613121302928 + 12613121302929.

It is an arithmetic number, because the mean of its divisors is an integer number (12613121302929).

Almost surely, 2^{25226242605857} is an apocalyptic number.

It is an amenable number.

25226242605857 is a deficient number, since it is larger than the sum of its proper divisors (1).

25226242605857 is an equidigital number, since it uses as much as digits as its factorization.

25226242605857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256000, while the sum is 56.

The spelling of 25226242605857 in words is "twenty-five trillion, two hundred twenty-six billion, two hundred forty-two million, six hundred five thousand, eight hundred fifty-seven".