551617567791 has 16 divisors (see below), whose sum is σ = 778905186048. Its totient is φ = 346045884800.

The previous prime is 551617567783. The next prime is 551617567807. The reversal of 551617567791 is 197765716155.

It is a cyclic number.

It is not a de Polignac number, because 551617567791 - 2³ = 551617567783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551617567741) 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 15 ways as a sum of consecutive naturals, for example, 782115 + ... + 1309556.

It is an arithmetic number, because the mean of its divisors is an integer number (48681574128).

Almost surely, 2^551617567791 is an apocalyptic number.

551617567791 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

551617567791 is a deficient number, since it is larger than the sum of its proper divisors (227287618257).

551617567791 is a wasteful number, since it uses less digits than its factorization.

551617567791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096862.

The product of its digits is 13891500, while the sum is 60.

The spelling of 551617567791 in words is "five hundred fifty-one billion, six hundred seventeen million, five hundred sixty-seven thousand, seven hundred ninety-one".