551804378 has 4 divisors (see below), whose sum is σ = 827706570. Its totient is φ = 275902188.

The previous prime is 551804333. The next prime is 551804401. The reversal of 551804378 is 873408155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 550981729 + 822649 = 23473^2 + 907^2 .

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 as a sum of consecutive naturals, namely, 137951093 + ... + 137951096.

Almost surely, 2^551804378 is an apocalyptic number.

551804378 is a deficient number, since it is larger than the sum of its proper divisors (275902192).

551804378 is a wasteful number, since it uses less digits than its factorization.

551804378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275902191.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 551804378 is about 23490.5167674106. The cubic root of 551804378 is about 820.2162715285.

The spelling of 551804378 in words is "five hundred fifty-one million, eight hundred four thousand, three hundred seventy-eight".