30747715823749 has 2 divisors, whose sum is σ = 30747715823750. Its totient is φ = 30747715823748.

The previous prime is 30747715823743. The next prime is 30747715823801. The reversal of 30747715823749 is 94732851774703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24686419542849 + 6061296280900 = 4968543^2 + 2461970^2 .

It is a cyclic number.

It is not a de Polignac number, because 30747715823749 - 2¹¹ = 30747715821701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30747715823743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15373857911874 + 15373857911875.

It is an arithmetic number, because the mean of its divisors is an integer number (15373857911875).

Almost surely, 2^{30747715823749} is an apocalyptic number.

It is an amenable number.

30747715823749 is a deficient number, since it is larger than the sum of its proper divisors (1).

30747715823749 is an equidigital number, since it uses as much as digits as its factorization.

30747715823749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248935680, while the sum is 67.

The spelling of 30747715823749 in words is "thirty trillion, seven hundred forty-seven billion, seven hundred fifteen million, eight hundred twenty-three thousand, seven hundred forty-nine".