25219397945 has 16 divisors (see below), whose sum is σ = 35322490368. Its totient is φ = 16925357760.

The previous prime is 25219397897. The next prime is 25219397963. The reversal of 25219397945 is 54979391252.

It is a happy number.

It is not a de Polignac number, because 25219397945 - 2¹⁰ = 25219396921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7663826 + ... + 7667115.

It is an arithmetic number, because the mean of its divisors is an integer number (2207655648).

Almost surely, 2^25219397945 is an apocalyptic number.

It is an amenable number.

25219397945 is a deficient number, since it is larger than the sum of its proper divisors (10103092423).

25219397945 is a wasteful number, since it uses less digits than its factorization.

25219397945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15331000.

The product of its digits is 6123600, while the sum is 56.

The spelling of 25219397945 in words is "twenty-five billion, two hundred nineteen million, three hundred ninety-seven thousand, nine hundred forty-five".