25469419691 has 4 divisors (see below), whose sum is σ = 25828143984. Its totient is φ = 25110695400.

The previous prime is 25469419639. The next prime is 25469419693. The reversal of 25469419691 is 19691496452.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25469419691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25469419693) 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, 179362040 + ... + 179362181.

It is an arithmetic number, because the mean of its divisors is an integer number (6457035996).

Almost surely, 2^25469419691 is an apocalyptic number.

25469419691 is a deficient number, since it is larger than the sum of its proper divisors (358724293).

25469419691 is an equidigital number, since it uses as much as digits as its factorization.

25469419691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358724292.

The product of its digits is 4199040, while the sum is 56.

The spelling of 25469419691 in words is "twenty-five billion, four hundred sixty-nine million, four hundred nineteen thousand, six hundred ninety-one".