25720705245 has 16 divisors (see below), whose sum is σ = 41648951232. Its totient is φ = 13552435200.

The previous prime is 25720705243. The next prime is 25720705277. The reversal of 25720705245 is 54250702752.

It is not a de Polignac number, because 25720705245 - 2¹ = 25720705243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720705243) 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, 10328356 + ... + 10330845.

It is an arithmetic number, because the mean of its divisors is an integer number (2603059452).

Almost surely, 2^25720705245 is an apocalyptic number.

It is an amenable number.

25720705245 is a deficient number, since it is larger than the sum of its proper divisors (15928245987).

25720705245 is a wasteful number, since it uses less digits than its factorization.

25720705245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20659292.

The product of its (nonzero) digits is 196000, while the sum is 39.

The spelling of 25720705245 in words is "twenty-five billion, seven hundred twenty million, seven hundred five thousand, two hundred forty-five".