28366681725 has 36 divisors (see below), whose sum is σ = 51282762336. Its totient is φ = 14987492640.

The previous prime is 28366681723. The next prime is 28366681753. The reversal of 28366681725 is 52718666382.

It is not a de Polignac number, because 28366681725 - 2¹ = 28366681723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28366681723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 565057 + ... + 613206.

It is an arithmetic number, because the mean of its divisors is an integer number (1424521176).

Almost surely, 2^28366681725 is an apocalyptic number.

28366681725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28366681725 is a deficient number, since it is larger than the sum of its proper divisors (22916080611).

28366681725 is a wasteful number, since it uses less digits than its factorization.

28366681725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178386 (or 1178378 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 28366681725 in words is "twenty-eight billion, three hundred sixty-six million, six hundred eighty-one thousand, seven hundred twenty-five".