25306396273 has 2 divisors, whose sum is σ = 25306396274. Its totient is φ = 25306396272.

The previous prime is 25306396177. The next prime is 25306396351. The reversal of 25306396273 is 37269360352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25239041424 + 67354849 = 158868^2 + 8207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25306396273 is a prime.

It is a super-2 number, since 2×25306396273² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25306391273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12653198136 + 12653198137.

It is an arithmetic number, because the mean of its divisors is an integer number (12653198137).

Almost surely, 2^25306396273 is an apocalyptic number.

It is an amenable number.

25306396273 is a deficient number, since it is larger than the sum of its proper divisors (1).

25306396273 is an equidigital number, since it uses as much as digits as its factorization.

25306396273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 46.

The spelling of 25306396273 in words is "twenty-five billion, three hundred six million, three hundred ninety-six thousand, two hundred seventy-three".