509640553 has 16 divisors (see below), whose sum is σ = 554727040. Its totient is φ = 466560000.

The previous prime is 509640529. The next prime is 509640559. The reversal of 509640553 is 355046905.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509640553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (509640559) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 103753 + ... + 108553.

It is an arithmetic number, because the mean of its divisors is an integer number (34670440).

Almost surely, 2^509640553 is an apocalyptic number.

It is an amenable number.

509640553 is a deficient number, since it is larger than the sum of its proper divisors (45086487).

509640553 is a wasteful number, since it uses less digits than its factorization.

509640553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 509640553 is about 22575.2198881871. The cubic root of 509640553 is about 798.7692288281.

The spelling of 509640553 in words is "five hundred nine million, six hundred forty thousand, five hundred fifty-three".