551515341643 has 8 divisors (see below), whose sum is σ = 630365777888. Its totient is φ = 472680537984.

The previous prime is 551515341613. The next prime is 551515341673. The reversal of 551515341643 is 346143515155.

It is an interprime number because it is at equal distance from previous prime (551515341613) and next prime (551515341673).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551515341643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551515341643.

It is not an unprimeable number, because it can be changed into a prime (551515341613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3832446 + ... + 3973747.

It is an arithmetic number, because the mean of its divisors is an integer number (78795722236).

Almost surely, 2^551515341643 is an apocalyptic number.

551515341643 is a deficient number, since it is larger than the sum of its proper divisors (78850436245).

551515341643 is a wasteful number, since it uses less digits than its factorization.

551515341643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7816293.

The product of its digits is 540000, while the sum is 43.

Adding to 551515341643 its reverse (346143515155), we get a palindrome (897658856798).

The spelling of 551515341643 in words is "five hundred fifty-one billion, five hundred fifteen million, three hundred forty-one thousand, six hundred forty-three".