25878317351 has 2 divisors, whose sum is σ = 25878317352. Its totient is φ = 25878317350.

The previous prime is 25878317347. The next prime is 25878317407. The reversal of 25878317351 is 15371387852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25878317351 - 2² = 25878317347 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25878317351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25878817351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12939158675 + 12939158676.

It is an arithmetic number, because the mean of its divisors is an integer number (12939158676).

Almost surely, 2^25878317351 is an apocalyptic number.

25878317351 is a deficient number, since it is larger than the sum of its proper divisors (1).

25878317351 is an equidigital number, since it uses as much as digits as its factorization.

25878317351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 50.

The spelling of 25878317351 in words is "twenty-five billion, eight hundred seventy-eight million, three hundred seventeen thousand, three hundred fifty-one".