553991649 has 4 divisors (see below), whose sum is σ = 738655536. Its totient is φ = 369327764.

The previous prime is 553991617. The next prime is 553991663. The reversal of 553991649 is 946199355.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 553991649 - 2⁵ = 553991617 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (553991609) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 92331939 + ... + 92331944.

It is an arithmetic number, because the mean of its divisors is an integer number (184663884).

Almost surely, 2^553991649 is an apocalyptic number.

It is an amenable number.

553991649 is a deficient number, since it is larger than the sum of its proper divisors (184663887).

553991649 is a wasteful number, since it uses less digits than its factorization.

553991649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184663886.

The product of its digits is 1312200, while the sum is 51.

The square root of 553991649 is about 23537.0271912151. The cubic root of 553991649 is about 821.2985814388.

The spelling of 553991649 in words is "five hundred fifty-three million, nine hundred ninety-one thousand, six hundred forty-nine".