72424683361 has 4 divisors (see below), whose sum is σ = 72432529924. Its totient is φ = 72416836800.

The previous prime is 72424683349. The next prime is 72424683367. The reversal of 72424683361 is 16338642427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33014890000 + 39409793361 = 181700^2 + 198519^2 .

It is a cyclic number.

It is not a de Polignac number, because 72424683361 - 2⁹ = 72424682849 is a prime.

It is a super-3 number, since 3×72424683361³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72424683367) 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, 3909420 + ... + 3927901.

It is an arithmetic number, because the mean of its divisors is an integer number (18108132481).

Almost surely, 2^72424683361 is an apocalyptic number.

It is an amenable number.

72424683361 is a deficient number, since it is larger than the sum of its proper divisors (7846563).

72424683361 is an equidigital number, since it uses as much as digits as its factorization.

72424683361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846562.

The product of its digits is 1161216, while the sum is 46.

The spelling of 72424683361 in words is "seventy-two billion, four hundred twenty-four million, six hundred eighty-three thousand, three hundred sixty-one".