25705504612 has 6 divisors (see below), whose sum is σ = 44984633078. Its totient is φ = 12852752304.

The previous prime is 25705504603. The next prime is 25705504639. The reversal of 25705504612 is 21640550752.

It can be written as a sum of positive squares in only one way, i.e., 22869303076 + 2836201536 = 151226^2 + 53256^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213188073 + ... + 3213188080.

Almost surely, 2^25705504612 is an apocalyptic number.

It is an amenable number.

25705504612 is a deficient number, since it is larger than the sum of its proper divisors (19279128466).

25705504612 is a wasteful number, since it uses less digits than its factorization.

25705504612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426376157 (or 6426376155 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The spelling of 25705504612 in words is "twenty-five billion, seven hundred five million, five hundred four thousand, six hundred twelve".