551404416 has 64 divisors (see below), whose sum is σ = 1468763280. Its totient is φ = 183287808.

The previous prime is 551404391. The next prime is 551404417. The reversal of 551404416 is 614404155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551404417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150640 + ... + 154256.

Almost surely, 2^551404416 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 551404416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734381640).

551404416 is an abundant number, since it is smaller than the sum of its proper divisors (917358864).

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

551404416 is a wasteful number, since it uses less digits than its factorization.

551404416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031 (or 4019 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 551404416 is about 23482.0019589472. The cubic root of 551404416 is about 820.0180523490.

The spelling of 551404416 in words is "five hundred fifty-one million, four hundred four thousand, four hundred sixteen".