25728118619 has 16 divisors (see below), whose sum is σ = 30877436928. Its totient is φ = 20959484832.

The previous prime is 25728118607. The next prime is 25728118673. The reversal of 25728118619 is 91681182752.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25728118619 is a prime.

It is a super-2 number, since 2×25728118619² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25728117619) 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, 483647 + ... + 534200.

It is an arithmetic number, because the mean of its divisors is an integer number (1929839808).

Almost surely, 2^25728118619 is an apocalyptic number.

25728118619 is a deficient number, since it is larger than the sum of its proper divisors (5149318309).

25728118619 is a wasteful number, since it uses less digits than its factorization.

25728118619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018034.

The product of its digits is 483840, while the sum is 50.

The spelling of 25728118619 in words is "twenty-five billion, seven hundred twenty-eight million, one hundred eighteen thousand, six hundred nineteen".