25229805697 has 2 divisors, whose sum is σ = 25229805698. Its totient is φ = 25229805696.

The previous prime is 25229805677. The next prime is 25229805701. The reversal of 25229805697 is 79650892252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22132215361 + 3097590336 = 148769^2 + 55656^2 .

It is a cyclic number.

It is not a de Polignac number, because 25229805697 - 2³¹ = 23082322049 is a prime.

It is not a weakly prime, because it can be changed into another prime (25229805637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12614902848 + 12614902849.

It is an arithmetic number, because the mean of its divisors is an integer number (12614902849).

Almost surely, 2^25229805697 is an apocalyptic number.

It is an amenable number.

25229805697 is a deficient number, since it is larger than the sum of its proper divisors (1).

25229805697 is an equidigital number, since it uses as much as digits as its factorization.

25229805697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 25229805697 in words is "twenty-five billion, two hundred twenty-nine million, eight hundred five thousand, six hundred ninety-seven".