551812218154 has 16 divisors (see below), whose sum is σ = 857166276096. Its totient is φ = 266147362800.

The previous prime is 551812218119. The next prime is 551812218161. The reversal of 551812218154 is 451812218155.

It is a super-3 number, since 3×551812218154³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551812218154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14289717 + ... + 14328280.

It is an arithmetic number, because the mean of its divisors is an integer number (53572892256).

Almost surely, 2^551812218154 is an apocalyptic number.

551812218154 is a deficient number, since it is larger than the sum of its proper divisors (305354057942).

551812218154 is a wasteful number, since it uses less digits than its factorization.

551812218154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28618341.

The product of its digits is 128000, while the sum is 43.

Subtracting from 551812218154 its reverse (451812218155), we obtain a palindrome (99999999999).

The spelling of 551812218154 in words is "five hundred fifty-one billion, eight hundred twelve million, two hundred eighteen thousand, one hundred fifty-four".