25645723196 has 48 divisors (see below), whose sum is σ = 45885958272. Its totient is φ = 12538680000.

The previous prime is 25645723193. The next prime is 25645723223. The reversal of 25645723196 is 69132754652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25645723193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31010135 + ... + 31010961.

It is an arithmetic number, because the mean of its divisors is an integer number (955957464).

Almost surely, 2^25645723196 is an apocalyptic number.

It is an amenable number.

25645723196 is a deficient number, since it is larger than the sum of its proper divisors (20240235076).

25645723196 is a wasteful number, since it uses less digits than its factorization.

25645723196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610 (or 1608 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

The spelling of 25645723196 in words is "twenty-five billion, six hundred forty-five million, seven hundred twenty-three thousand, one hundred ninety-six".