25697951339 has 2 divisors, whose sum is σ = 25697951340. Its totient is φ = 25697951338.

The previous prime is 25697951333. The next prime is 25697951369. The reversal of 25697951339 is 93315979652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25697951339 - 2¹² = 25697947243 is a prime.

It is a super-2 number, since 2×25697951339² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25697951333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12848975669 + 12848975670.

It is an arithmetic number, because the mean of its divisors is an integer number (12848975670).

Almost surely, 2^25697951339 is an apocalyptic number.

25697951339 is a deficient number, since it is larger than the sum of its proper divisors (1).

25697951339 is an equidigital number, since it uses as much as digits as its factorization.

25697951339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13778100, while the sum is 59.

The spelling of 25697951339 in words is "twenty-five billion, six hundred ninety-seven million, nine hundred fifty-one thousand, three hundred thirty-nine".