11721772433 has 8 divisors (see below), whose sum is σ = 13402171968. Its totient is φ = 10042838064.

The previous prime is 11721772427. The next prime is 11721772441. The reversal of 11721772433 is 33427712711.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11721772433 - 2³² = 7426805137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11721772423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349091 + ... + 381192.

It is an arithmetic number, because the mean of its divisors is an integer number (1675271496).

Almost surely, 2^11721772433 is an apocalyptic number.

It is an amenable number.

11721772433 is a deficient number, since it is larger than the sum of its proper divisors (1680399535).

11721772433 is an equidigital number, since it uses as much as digits as its factorization.

11721772433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732583.

The product of its digits is 49392, while the sum is 38.

The spelling of 11721772433 in words is "eleven billion, seven hundred twenty-one million, seven hundred seventy-two thousand, four hundred thirty-three".