25661511796 has 48 divisors (see below), whose sum is σ = 48136345600. Its totient is φ = 11934978048.

The previous prime is 25661511761. The next prime is 25661511833. The reversal of 25661511796 is 69711516652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922540 + ... + 949948.

Almost surely, 2^25661511796 is an apocalyptic number.

It is an amenable number.

25661511796 is a deficient number, since it is larger than the sum of its proper divisors (22474833804).

25661511796 is a wasteful number, since it uses less digits than its factorization.

25661511796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27656 (or 27654 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The spelling of 25661511796 in words is "twenty-five billion, six hundred sixty-one million, five hundred eleven thousand, seven hundred ninety-six".