72944593837 has 4 divisors (see below), whose sum is σ = 77235452316. Its totient is φ = 68653735360.

The previous prime is 72944593819. The next prime is 72944593847. The reversal of 72944593837 is 73839544927.

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 21427397161 + 51517196676 = 146381^2 + 226974^2 .

It is a cyclic number.

It is not a de Polignac number, because 72944593837 - 2¹¹ = 72944591789 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 (72944593847) 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, 2145429214 + ... + 2145429247.

It is an arithmetic number, because the mean of its divisors is an integer number (19308863079).

Almost surely, 2^72944593837 is an apocalyptic number.

It is an amenable number.

72944593837 is a deficient number, since it is larger than the sum of its proper divisors (4290858479).

72944593837 is a wasteful number, since it uses less digits than its factorization.

72944593837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4290858478.

The product of its digits is 45722880, while the sum is 61.

The spelling of 72944593837 in words is "seventy-two billion, nine hundred forty-four million, five hundred ninety-three thousand, eight hundred thirty-seven".