28448850970513 has 4 divisors (see below), whose sum is σ = 28709849603380. Its totient is φ = 28187852337648.

The previous prime is 28448850970457. The next prime is 28448850970517. The reversal of 28448850970513 is 31507905884482.

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 22799211621904 + 5649639348609 = 4774852^2 + 2376897^2 .

It is a cyclic number.

It is not a de Polignac number, because 28448850970513 - 2¹⁷ = 28448850839441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28448850970517) by changing a digit.

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, 130499316270 + ... + 130499316487.

It is an arithmetic number, because the mean of its divisors is an integer number (7177462400845).

Almost surely, 2^{28448850970513} is an apocalyptic number.

It is an amenable number.

28448850970513 is a deficient number, since it is larger than the sum of its proper divisors (260998632867).

28448850970513 is a wasteful number, since it uses less digits than its factorization.

28448850970513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260998632866.

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 28448850970513 in words is "twenty-eight trillion, four hundred forty-eight billion, eight hundred fifty million, nine hundred seventy thousand, five hundred thirteen".