25679281748387 has 2 divisors, whose sum is σ = 25679281748388. Its totient is φ = 25679281748386.

The previous prime is 25679281748381. The next prime is 25679281748411. The reversal of 25679281748387 is 78384718297652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25679281748387 - 2¹⁶ = 25679281682851 is a prime.

It is a super-2 number, since 2×25679281748387² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25679281748381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839640874193 + 12839640874194.

It is an arithmetic number, because the mean of its divisors is an integer number (12839640874194).

Almost surely, 2^{25679281748387} is an apocalyptic number.

25679281748387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25679281748387 is an equidigital number, since it uses as much as digits as its factorization.

25679281748387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2275983360, while the sum is 77.

The spelling of 25679281748387 in words is "twenty-five trillion, six hundred seventy-nine billion, two hundred eighty-one million, seven hundred forty-eight thousand, three hundred eighty-seven".