11722278389 has 8 divisors (see below), whose sum is σ = 12074538840. Its totient is φ = 11373177600.

The previous prime is 11722278383. The next prime is 11722278427. The reversal of 11722278389 is 98387222711.

It can be written as a sum of positive squares in 4 ways, for example, as 7896100 + 11714382289 = 2810^2 + 108233^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11722278389 - 2²⁰ = 11721229813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722278383) 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, 782384 + ... + 797225.

It is an arithmetic number, because the mean of its divisors is an integer number (1509317355).

Almost surely, 2^11722278389 is an apocalyptic number.

It is an amenable number.

11722278389 is a deficient number, since it is larger than the sum of its proper divisors (352260451).

11722278389 is a wasteful number, since it uses less digits than its factorization.

11722278389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579831.

The product of its digits is 677376, while the sum is 50.

The spelling of 11722278389 in words is "eleven billion, seven hundred twenty-two million, two hundred seventy-eight thousand, three hundred eighty-nine".