28356963749 has 2 divisors, whose sum is σ = 28356963750. Its totient is φ = 28356963748.

The previous prime is 28356963737. The next prime is 28356963797. The reversal of 28356963749 is 94736965382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26217438724 + 2139525025 = 161918^2 + 46255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28356963749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28356963691 and 28356963700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28356963049) 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 as a sum of consecutive naturals, namely, 14178481874 + 14178481875.

It is an arithmetic number, because the mean of its divisors is an integer number (14178481875).

Almost surely, 2^28356963749 is an apocalyptic number.

It is an amenable number.

28356963749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28356963749 is an equidigital number, since it uses as much as digits as its factorization.

28356963749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 62.

The spelling of 28356963749 in words is "twenty-eight billion, three hundred fifty-six million, nine hundred sixty-three thousand, seven hundred forty-nine".