28101814025 has 6 divisors (see below), whose sum is σ = 34846249422. Its totient is φ = 22481451200.

The previous prime is 28101814009. The next prime is 28101814049. The reversal of 28101814025 is 52041810182.

It can be written as a sum of positive squares in 3 ways, for example, as 133934329 + 27967879696 = 11573^2 + 167236^2 .

It is not a de Polignac number, because 28101814025 - 2⁴ = 28101814009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28101813982 and 28101814000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562036256 + ... + 562036305.

It is an arithmetic number, because the mean of its divisors is an integer number (5807708237).

Almost surely, 2^28101814025 is an apocalyptic number.

28101814025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28101814025 is a deficient number, since it is larger than the sum of its proper divisors (6744435397).

28101814025 is a wasteful number, since it uses less digits than its factorization.

28101814025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124072571 (or 1124072566 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The spelling of 28101814025 in words is "twenty-eight billion, one hundred one million, eight hundred fourteen thousand, twenty-five".