25966649312 has 24 divisors (see below), whose sum is σ = 51190692336. Its totient is φ = 12965838592.

The previous prime is 25966649299. The next prime is 25966649339. The reversal of 25966649312 is 21394666952.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522293 + ... + 569844.

It is an arithmetic number, because the mean of its divisors is an integer number (2132945514).

Almost surely, 2^25966649312 is an apocalyptic number.

It is an amenable number.

25966649312 is a deficient number, since it is larger than the sum of its proper divisors (25224043024).

25966649312 is a wasteful number, since it uses less digits than its factorization.

25966649312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092890 (or 1092882 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 53.

The spelling of 25966649312 in words is "twenty-five billion, nine hundred sixty-six million, six hundred forty-nine thousand, three hundred twelve".