25621725705 has 16 divisors (see below), whose sum is σ = 41002723584. Its totient is φ = 13662266240.

The previous prime is 25621725671. The next prime is 25621725709. The reversal of 25621725705 is 50752712652.

It is not a de Polignac number, because 25621725705 - 2⁹ = 25621725193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25621725709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84804 + ... + 241733.

It is an arithmetic number, because the mean of its divisors is an integer number (2562670224).

Almost surely, 2^25621725705 is an apocalyptic number.

It is an amenable number.

25621725705 is a deficient number, since it is larger than the sum of its proper divisors (15380997879).

25621725705 is a wasteful number, since it uses less digits than its factorization.

25621725705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331776.

The product of its (nonzero) digits is 294000, while the sum is 42.

The spelling of 25621725705 in words is "twenty-five billion, six hundred twenty-one million, seven hundred twenty-five thousand, seven hundred five".