28125266897 has 16 divisors (see below), whose sum is σ = 34702950912. Its totient is φ = 22196877120.

The previous prime is 28125266887. The next prime is 28125266909. The reversal of 28125266897 is 79866252182.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28125266897 - 2⁸ = 28125266641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28125266867) 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, 353129 + ... + 425382.

It is an arithmetic number, because the mean of its divisors is an integer number (2168934432).

Almost surely, 2^28125266897 is an apocalyptic number.

It is an amenable number.

28125266897 is a deficient number, since it is larger than the sum of its proper divisors (6577684015).

28125266897 is a wasteful number, since it uses less digits than its factorization.

28125266897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778928.

The product of its digits is 5806080, while the sum is 56.

The spelling of 28125266897 in words is "twenty-eight billion, one hundred twenty-five million, two hundred sixty-six thousand, eight hundred ninety-seven".