72372511793 has 4 divisors (see below), whose sum is σ = 73118620260. Its totient is φ = 71626403328.

The previous prime is 72372511777. The next prime is 72372511801. The reversal of 72372511793 is 39711527327.

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 28420227889 + 43952283904 = 168583^2 + 209648^2 .

It is a cyclic number.

It is not a de Polignac number, because 72372511793 - 2⁴ = 72372511777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72372511723) 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, 373054088 + ... + 373054281.

It is an arithmetic number, because the mean of its divisors is an integer number (18279655065).

Almost surely, 2^72372511793 is an apocalyptic number.

It is an amenable number.

72372511793 is a deficient number, since it is larger than the sum of its proper divisors (746108467).

72372511793 is an equidigital number, since it uses as much as digits as its factorization.

72372511793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746108466.

The product of its digits is 555660, while the sum is 47.

The spelling of 72372511793 in words is "seventy-two billion, three hundred seventy-two million, five hundred eleven thousand, seven hundred ninety-three".