247740413801549 has 2 divisors, whose sum is σ = 247740413801550. Its totient is φ = 247740413801548.

The previous prime is 247740413801521. The next prime is 247740413801593. The reversal of 247740413801549 is 945108314047742.

247740413801549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246062046913225 + 1678366888324 = 15686365^2 + 1295518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247740413801549 is a prime.

It is a super-2 number, since 2×247740413801549² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247740413801599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123870206900774 + 123870206900775.

It is an arithmetic number, because the mean of its divisors is an integer number (123870206900775).

Almost surely, 2^{247740413801549} is an apocalyptic number.

It is an amenable number.

247740413801549 is a deficient number, since it is larger than the sum of its proper divisors (1).

247740413801549 is an equidigital number, since it uses as much as digits as its factorization.

247740413801549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 247740413801549 in words is "two hundred forty-seven trillion, seven hundred forty billion, four hundred thirteen million, eight hundred one thousand, five hundred forty-nine".