25172572393 has 2 divisors, whose sum is σ = 25172572394. Its totient is φ = 25172572392.

The previous prime is 25172572361. The next prime is 25172572471. The reversal of 25172572393 is 39327527152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25143810624 + 28761769 = 158568^2 + 5363^2 .

It is a cyclic number.

It is not a de Polignac number, because 25172572393 - 2⁵ = 25172572361 is a prime.

It is not a weakly prime, because it can be changed into another prime (25172572793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12586286196 + 12586286197.

It is an arithmetic number, because the mean of its divisors is an integer number (12586286197).

Almost surely, 2^25172572393 is an apocalyptic number.

It is an amenable number.

25172572393 is a deficient number, since it is larger than the sum of its proper divisors (1).

25172572393 is an equidigital number, since it uses as much as digits as its factorization.

25172572393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 46.

The spelling of 25172572393 in words is "twenty-five billion, one hundred seventy-two million, five hundred seventy-two thousand, three hundred ninety-three".