551873840 has 80 divisors (see below), whose sum is σ = 1475982912. Its totient is φ = 187978752.

The previous prime is 551873821. The next prime is 551873851. The reversal of 551873840 is 48378155.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84782 + ... + 91058.

Almost surely, 2^551873840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551873840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737991456).

551873840 is an abundant number, since it is smaller than the sum of its proper divisors (924109072).

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

551873840 is a wasteful number, since it uses less digits than its factorization.

551873840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6454 (or 6448 counting only the distinct ones).

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

The square root of 551873840 is about 23491.9952324191. The cubic root of 551873840 is about 820.2506867878.

The spelling of 551873840 in words is "five hundred fifty-one million, eight hundred seventy-three thousand, eight hundred forty".