25949298656 has 12 divisors (see below), whose sum is σ = 51087681792. Its totient is φ = 12974649312.

The previous prime is 25949298647. The next prime is 25949298691. The reversal of 25949298656 is 65689294952.

It is a super-2 number, since 2×25949298656² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25949298592 and 25949298601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405457760 + ... + 405457823.

It is an arithmetic number, because the mean of its divisors is an integer number (4257306816).

Almost surely, 2^25949298656 is an apocalyptic number.

It is an amenable number.

25949298656 is a deficient number, since it is larger than the sum of its proper divisors (25138383136).

25949298656 is an equidigital number, since it uses as much as digits as its factorization.

25949298656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810915593 (or 810915585 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 65.

The spelling of 25949298656 in words is "twenty-five billion, nine hundred forty-nine million, two hundred ninety-eight thousand, six hundred fifty-six".