25656272013 has 32 divisors (see below), whose sum is σ = 35173111680. Its totient is φ = 16629442560.

The previous prime is 25656271967. The next prime is 25656272017. The reversal of 25656272013 is 31027265652.

It is a happy number.

It is not a de Polignac number, because 25656272013 - 2¹³ = 25656263821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25656272017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9832453 + ... + 9835061.

It is an arithmetic number, because the mean of its divisors is an integer number (1099159740).

Almost surely, 2^25656272013 is an apocalyptic number.

It is an amenable number.

25656272013 is a deficient number, since it is larger than the sum of its proper divisors (9516839667).

25656272013 is a wasteful number, since it uses less digits than its factorization.

25656272013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 25656272013 in words is "twenty-five billion, six hundred fifty-six million, two hundred seventy-two thousand, thirteen".