28953605749 has 2 divisors, whose sum is σ = 28953605750. Its totient is φ = 28953605748.

The previous prime is 28953605741. The next prime is 28953605803. The reversal of 28953605749 is 94750635982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28919383249 + 34222500 = 170057^2 + 5850^2 .

It is a cyclic number.

It is not a de Polignac number, because 28953605749 - 2³ = 28953605741 is a prime.

It is a super-2 number, since 2×28953605749² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28953605693 and 28953605702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28953605741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14476802874 + 14476802875.

It is an arithmetic number, because the mean of its divisors is an integer number (14476802875).

Almost surely, 2^28953605749 is an apocalyptic number.

It is an amenable number.

28953605749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28953605749 is an equidigital number, since it uses as much as digits as its factorization.

28953605749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 28953605749 in words is "twenty-eight billion, nine hundred fifty-three million, six hundred five thousand, seven hundred forty-nine".