28751315699 has 4 divisors (see below), whose sum is σ = 29074364280. Its totient is φ = 28428267120.

The previous prime is 28751315683. The next prime is 28751315731. The reversal of 28751315699 is 99651315782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99651315782 = 2 ⋅49825657891.

It is a cyclic number.

It is not a de Polignac number, because 28751315699 - 2⁴ = 28751315683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28751315629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161524157 + ... + 161524334.

It is an arithmetic number, because the mean of its divisors is an integer number (7268591070).

Almost surely, 2^28751315699 is an apocalyptic number.

28751315699 is a deficient number, since it is larger than the sum of its proper divisors (323048581).

28751315699 is an equidigital number, since it uses as much as digits as its factorization.

28751315699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323048580.

The product of its digits is 4082400, while the sum is 56.

The spelling of 28751315699 in words is "twenty-eight billion, seven hundred fifty-one million, three hundred fifteen thousand, six hundred ninety-nine".