25157523197243 has 2 divisors, whose sum is σ = 25157523197244. Its totient is φ = 25157523197242.

The previous prime is 25157523197231. The next prime is 25157523197311. The reversal of 25157523197243 is 34279132575152.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25157523197243 - 2¹⁸ = 25157522935099 is a prime.

It is not a weakly prime, because it can be changed into another prime (25157523197203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12578761598621 + 12578761598622.

It is an arithmetic number, because the mean of its divisors is an integer number (12578761598622).

Almost surely, 2^{25157523197243} is an apocalyptic number.

25157523197243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25157523197243 is an equidigital number, since it uses as much as digits as its factorization.

25157523197243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 56.

The spelling of 25157523197243 in words is "twenty-five trillion, one hundred fifty-seven billion, five hundred twenty-three million, one hundred ninety-seven thousand, two hundred forty-three".