25728694215 has 16 divisors (see below), whose sum is σ = 47046755328. Its totient is φ = 11761688736.

The previous prime is 25728694169. The next prime is 25728694223. The reversal of 25728694215 is 51249682752.

It is not a de Polignac number, because 25728694215 - 2²⁴ = 25711916999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122517487 + ... + 122517696.

It is an arithmetic number, because the mean of its divisors is an integer number (2940422208).

Almost surely, 2^25728694215 is an apocalyptic number.

25728694215 is a deficient number, since it is larger than the sum of its proper divisors (21318061113).

25728694215 is a wasteful number, since it uses less digits than its factorization.

25728694215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245035198.

The product of its digits is 2419200, while the sum is 51.

The spelling of 25728694215 in words is "twenty-five billion, seven hundred twenty-eight million, six hundred ninety-four thousand, two hundred fifteen".