551874644 has 6 divisors (see below), whose sum is σ = 965780634. Its totient is φ = 275937320.

The previous prime is 551874643. The next prime is 551874677. The reversal of 551874644 is 446478155.

It can be written as a sum of positive squares in only one way, i.e., 548496400 + 3378244 = 23420^2 + 1838^2 .

It is a junction number, because it is equal to n+sod(n) for n = 551874595 and 551874604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551874643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68984327 + ... + 68984334.

It is an arithmetic number, because the mean of its divisors is an integer number (160963439).

Almost surely, 2^551874644 is an apocalyptic number.

It is an amenable number.

551874644 is a deficient number, since it is larger than the sum of its proper divisors (413905990).

551874644 is a wasteful number, since it uses less digits than its factorization.

551874644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137968665 (or 137968663 counting only the distinct ones).

The product of its digits is 537600, while the sum is 44.

The square root of 551874644 is about 23492.0123446247. The cubic root of 551874644 is about 820.2510851163.

The spelling of 551874644 in words is "five hundred fifty-one million, eight hundred seventy-four thousand, six hundred forty-four".