25728648111 has 20 divisors (see below), whose sum is σ = 38627314000. Its totient is φ = 17066228256.

The previous prime is 25728648109. The next prime is 25728648139. The reversal of 25728648111 is 11184682752.

25728648111 is a `hidden beast` number, since 2 + 572 + 8 + 64 + 8 + 1 + 11 = 666.

It is not a de Polignac number, because 25728648111 - 2¹ = 25728648109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728648151) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 781966 + ... + 814203.

It is an arithmetic number, because the mean of its divisors is an integer number (1931365700).

Almost surely, 2^25728648111 is an apocalyptic number.

25728648111 is a deficient number, since it is larger than the sum of its proper divisors (12898665889).

25728648111 is a wasteful number, since it uses less digits than its factorization.

25728648111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596380 (or 1596371 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The spelling of 25728648111 in words is "twenty-five billion, seven hundred twenty-eight million, six hundred forty-eight thousand, one hundred eleven".