25985670427 has 2 divisors, whose sum is σ = 25985670428. Its totient is φ = 25985670426.

The previous prime is 25985670419. The next prime is 25985670437. The reversal of 25985670427 is 72407658952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25985670427 - 2³ = 25985670419 is a prime.

It is not a weakly prime, because it can be changed into another prime (25985670437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12992835213 + 12992835214.

It is an arithmetic number, because the mean of its divisors is an integer number (12992835214).

Almost surely, 2^25985670427 is an apocalyptic number.

25985670427 is a deficient number, since it is larger than the sum of its proper divisors (1).

25985670427 is an equidigital number, since it uses as much as digits as its factorization.

25985670427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 25985670427 in words is "twenty-five billion, nine hundred eighty-five million, six hundred seventy thousand, four hundred twenty-seven".