2009631553 has 4 divisors (see below), whose sum is σ = 2009721600. Its totient is φ = 2009541508.

The previous prime is 2009631529. The next prime is 2009631571. The reversal of 2009631553 is 3551369002.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2009631553 - 2¹⁷ = 2009500481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009631053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16248 + ... + 65446.

It is an arithmetic number, because the mean of its divisors is an integer number (502430400).

Almost surely, 2^2009631553 is an apocalyptic number.

It is an amenable number.

2009631553 is a deficient number, since it is larger than the sum of its proper divisors (90047).

2009631553 is an equidigital number, since it uses as much as digits as its factorization.

2009631553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90046.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 2009631553 is about 44828.9142518531. The cubic root of 2009631553 is about 1261.9403113129.

The spelling of 2009631553 in words is "two billion, nine million, six hundred thirty-one thousand, five hundred fifty-three".