28525864333145 has 4 divisors (see below), whose sum is σ = 34231037199780. Its totient is φ = 22820691466512.

The previous prime is 28525864333123. The next prime is 28525864333181. The reversal of 28525864333145 is 54133346852582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19574350852681 + 8951513480464 = 4424291^2 + 2991908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28525864333145 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852586433310 + ... + 2852586433319.

It is an arithmetic number, because the mean of its divisors is an integer number (8557759299945).

Almost surely, 2^{28525864333145} is an apocalyptic number.

It is an amenable number.

28525864333145 is a deficient number, since it is larger than the sum of its proper divisors (5705172866635).

28525864333145 is an equidigital number, since it uses as much as digits as its factorization.

28525864333145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705172866634.

The product of its digits is 82944000, while the sum is 59.

The spelling of 28525864333145 in words is "twenty-eight trillion, five hundred twenty-five billion, eight hundred sixty-four million, three hundred thirty-three thousand, one hundred forty-five".