25645340467 has 4 divisors (see below), whose sum is σ = 25646091120. Its totient is φ = 25644589816.

The previous prime is 25645340447. The next prime is 25645340473. The reversal of 25645340467 is 76404354652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25645340467 - 2⁷ = 25645340339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25645340447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321508 + ... + 393265.

It is an arithmetic number, because the mean of its divisors is an integer number (6411522780).

Almost surely, 2^25645340467 is an apocalyptic number.

25645340467 is a deficient number, since it is larger than the sum of its proper divisors (750653).

25645340467 is an equidigital number, since it uses as much as digits as its factorization.

25645340467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750652.

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 25645340467 in words is "twenty-five billion, six hundred forty-five million, three hundred forty thousand, four hundred sixty-seven".