25949247696 has 80 divisors (see below), whose sum is σ = 74508534720. Its totient is φ = 8646894720.

The previous prime is 25949247677. The next prime is 25949247697. The reversal of 25949247696 is 69674294952.

25949247696 is a `hidden beast` number, since 2 + 59 + 492 + 4 + 7 + 6 + 96 = 666.

It is a super-2 number, since 2×25949247696² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25949247697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604611 + ... + 1620701.

It is an arithmetic number, because the mean of its divisors is an integer number (931356684).

Almost surely, 2^25949247696 is an apocalyptic number.

It is an amenable number.

25949247696 is an abundant number, since it is smaller than the sum of its proper divisors (48559287024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25949247696 is a wasteful number, since it uses less digits than its factorization.

25949247696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19841 (or 19829 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The spelling of 25949247696 in words is "twenty-five billion, nine hundred forty-nine million, two hundred forty-seven thousand, six hundred ninety-six".