551554243644 has 12 divisors (see below), whose sum is σ = 1286959901864. Its totient is φ = 183851414544.

The previous prime is 551554243619. The next prime is 551554243663. The reversal of 551554243644 is 446342455155.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 551554243593 and 551554243602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22981426807 + ... + 22981426830.

Almost surely, 2^551554243644 is an apocalyptic number.

It is an amenable number.

551554243644 is an abundant number, since it is smaller than the sum of its proper divisors (735405658220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551554243644 is a wasteful number, since it uses less digits than its factorization.

551554243644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45962853644 (or 45962853642 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 48.

Adding to 551554243644 its reverse (446342455155), we get a palindrome (997896698799).

The spelling of 551554243644 in words is "five hundred fifty-one billion, five hundred fifty-four million, two hundred forty-three thousand, six hundred forty-four".