25519983667 has 2 divisors, whose sum is σ = 25519983668. Its totient is φ = 25519983666.

The previous prime is 25519983637. The next prime is 25519983677. The reversal of 25519983667 is 76638991552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25519983667 - 2¹⁵ = 25519950899 is a prime.

It is not a weakly prime, because it can be changed into another prime (25519983617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12759991833 + 12759991834.

It is an arithmetic number, because the mean of its divisors is an integer number (12759991834).

Almost surely, 2^25519983667 is an apocalyptic number.

25519983667 is a deficient number, since it is larger than the sum of its proper divisors (1).

25519983667 is an equidigital number, since it uses as much as digits as its factorization.

25519983667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24494400, while the sum is 61.

The spelling of 25519983667 in words is "twenty-five billion, five hundred nineteen million, nine hundred eighty-three thousand, six hundred sixty-seven".