28315749523 has 2 divisors, whose sum is σ = 28315749524. Its totient is φ = 28315749522.

The previous prime is 28315749481. The next prime is 28315749557. The reversal of 28315749523 is 32594751382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28315749523 - 2²⁵ = 28282195091 is a prime.

It is not a weakly prime, because it can be changed into another prime (28315749023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14157874761 + 14157874762.

It is an arithmetic number, because the mean of its divisors is an integer number (14157874762).

Almost surely, 2^28315749523 is an apocalyptic number.

28315749523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28315749523 is an equidigital number, since it uses as much as digits as its factorization.

28315749523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 49.

The spelling of 28315749523 in words is "twenty-eight billion, three hundred fifteen million, seven hundred forty-nine thousand, five hundred twenty-three".