25646454363 has 4 divisors (see below), whose sum is σ = 34195272488. Its totient is φ = 17097636240.

The previous prime is 25646454331. The next prime is 25646454403. The reversal of 25646454363 is 36345464652.

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

It is not a de Polignac number, because 25646454363 - 2⁵ = 25646454331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25646454563) 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, 4274409058 + ... + 4274409063.

It is an arithmetic number, because the mean of its divisors is an integer number (8548818122).

Almost surely, 2^25646454363 is an apocalyptic number.

25646454363 is a deficient number, since it is larger than the sum of its proper divisors (8548818125).

25646454363 is an equidigital number, since it uses as much as digits as its factorization.

25646454363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8548818124.

The product of its digits is 6220800, while the sum is 48.

The spelling of 25646454363 in words is "twenty-five billion, six hundred forty-six million, four hundred fifty-four thousand, three hundred sixty-three".