72443246633 has 4 divisors (see below), whose sum is σ = 76704614100. Its totient is φ = 68181879168.

The previous prime is 72443246549. The next prime is 72443246639. The reversal of 72443246633 is 33664234427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33664234427 = 113 ⋅297913579.

It can be written as a sum of positive squares in 2 ways, for example, as 30832550464 + 41610696169 = 175592^2 + 203987^2 .

It is a cyclic number.

It is not a de Polignac number, because 72443246633 - 2¹⁸ = 72442984489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72443246639) 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, 2130683708 + ... + 2130683741.

It is an arithmetic number, because the mean of its divisors is an integer number (19176153525).

Almost surely, 2^72443246633 is an apocalyptic number.

It is an amenable number.

72443246633 is a deficient number, since it is larger than the sum of its proper divisors (4261367467).

72443246633 is a wasteful number, since it uses less digits than its factorization.

72443246633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261367466.

The product of its digits is 1741824, while the sum is 44.

The spelling of 72443246633 in words is "seventy-two billion, four hundred forty-three million, two hundred forty-six thousand, six hundred thirty-three".