551616241623 has 16 divisors (see below), whose sum is σ = 741282969600. Its totient is φ = 364852561184.

The previous prime is 551616241577. The next prime is 551616241637. The reversal of 551616241623 is 326142616155.

It is a cyclic number.

It is not a de Polignac number, because 551616241623 - 2²⁸ = 551347806167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551616242623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329211 + ... + 1100732.

It is an arithmetic number, because the mean of its divisors is an integer number (46330185600).

Almost surely, 2^551616241623 is an apocalyptic number.

551616241623 is a deficient number, since it is larger than the sum of its proper divisors (189666727977).

551616241623 is a wasteful number, since it uses less digits than its factorization.

551616241623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430958.

The product of its digits is 259200, while the sum is 42.

Adding to 551616241623 its reverse (326142616155), we get a palindrome (877758857778).

The spelling of 551616241623 in words is "five hundred fifty-one billion, six hundred sixteen million, two hundred forty-one thousand, six hundred twenty-three".