247040071256047 has 4 divisors (see below), whose sum is σ = 247350033705096. Its totient is φ = 246730108807000.

The previous prime is 247040071256039. The next prime is 247040071256071. The reversal of 247040071256047 is 740652170040742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247040071256047 - 2³ = 247040071256039 is a prime.

It is a super-2 number, since 2×247040071256047² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247040071256087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154981223329 + ... + 154981224922.

It is an arithmetic number, because the mean of its divisors is an integer number (61837508426274).

Almost surely, 2^{247040071256047} is an apocalyptic number.

247040071256047 is a deficient number, since it is larger than the sum of its proper divisors (309962449049).

247040071256047 is an equidigital number, since it uses as much as digits as its factorization.

247040071256047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309962449048.

The product of its (nonzero) digits is 2634240, while the sum is 49.

The spelling of 247040071256047 in words is "two hundred forty-seven trillion, forty billion, seventy-one million, two hundred fifty-six thousand, forty-seven".