551545650 has 36 divisors (see below), whose sum is σ = 1481820522. Its totient is φ = 147078720.

The previous prime is 551545639. The next prime is 551545663. The reversal of 551545650 is 56545155.

551545650 is a `hidden beast` number, since 5 + 51 + 545 + 65 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 518609529 + 32936121 = 22773^2 + 5739^2 .

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 in 17 ways as a sum of consecutive naturals, for example, 612379 + ... + 613278.

Almost surely, 2^551545650 is an apocalyptic number.

551545650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

551545650 is an abundant number, since it is smaller than the sum of its proper divisors (930274872).

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

551545650 is a wasteful number, since it uses less digits than its factorization.

551545650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225675 (or 1225667 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The square root of 551545650 is about 23485.0090483270. The cubic root of 551545650 is about 820.0880581618.

The spelling of 551545650 in words is "five hundred fifty-one million, five hundred forty-five thousand, six hundred fifty".