25505992612 has 12 divisors (see below), whose sum is σ = 44638513920. Its totient is φ = 12752131496.

The previous prime is 25505992609. The next prime is 25505992613. The reversal of 25505992612 is 21629950552.

It is not an unprimeable number, because it can be changed into a prime (25505992613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147412 + ... + 269707.

It is an arithmetic number, because the mean of its divisors is an integer number (3719876160).

Almost surely, 2^25505992612 is an apocalyptic number.

It is an amenable number.

25505992612 is a deficient number, since it is larger than the sum of its proper divisors (19132521308).

25505992612 is a wasteful number, since it uses less digits than its factorization.

25505992612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432410 (or 432408 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 46.

The spelling of 25505992612 in words is "twenty-five billion, five hundred five million, nine hundred ninety-two thousand, six hundred twelve".