25384667851 has 2 divisors, whose sum is σ = 25384667852. Its totient is φ = 25384667850.

The previous prime is 25384667747. The next prime is 25384667857. The reversal of 25384667851 is 15876648352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25384667851 - 2¹⁵ = 25384635083 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25384667792 and 25384667801.

It is not a weakly prime, because it can be changed into another prime (25384667857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12692333925 + 12692333926.

It is an arithmetic number, because the mean of its divisors is an integer number (12692333926).

Almost surely, 2^25384667851 is an apocalyptic number.

25384667851 is a deficient number, since it is larger than the sum of its proper divisors (1).

25384667851 is an equidigital number, since it uses as much as digits as its factorization.

25384667851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9676800, while the sum is 55.

The spelling of 25384667851 in words is "twenty-five billion, three hundred eighty-four million, six hundred sixty-seven thousand, eight hundred fifty-one".