11721733630 has 16 divisors (see below), whose sum is σ = 21102267744. Its totient is φ = 4687994080.

The previous prime is 11721733613. The next prime is 11721733637. The reversal of 11721733630 is 3633712711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721733637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14101 + ... + 153760.

It is an arithmetic number, because the mean of its divisors is an integer number (1318891734).

Almost surely, 2^11721733630 is an apocalyptic number.

11721733630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11721733630 is a deficient number, since it is larger than the sum of its proper divisors (9380534114).

11721733630 is a wasteful number, since it uses less digits than its factorization.

11721733630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174851.

The product of its (nonzero) digits is 15876, while the sum is 34.

The spelling of 11721733630 in words is "eleven billion, seven hundred twenty-one million, seven hundred thirty-three thousand, six hundred thirty".