551247116647 has 4 divisors (see below), whose sum is σ = 551413008360. Its totient is φ = 551081224936.

The previous prime is 551247116633. The next prime is 551247116659. The reversal of 551247116647 is 746611742155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551247116647 is a prime.

It is a super-2 number, since 2×551247116647² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551247116647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551247116617) 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 in 3 ways as a sum of consecutive naturals, for example, 82940872 + ... + 82947517.

It is an arithmetic number, because the mean of its divisors is an integer number (137853252090).

Almost surely, 2^551247116647 is an apocalyptic number.

551247116647 is a deficient number, since it is larger than the sum of its proper divisors (165891713).

551247116647 is a wasteful number, since it uses less digits than its factorization.

551247116647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165891712.

The product of its digits is 1411200, while the sum is 49.

The spelling of 551247116647 in words is "five hundred fifty-one billion, two hundred forty-seven million, one hundred sixteen thousand, six hundred forty-seven".