72783842331 has 4 divisors (see below), whose sum is σ = 97045123112. Its totient is φ = 48522561552.

The previous prime is 72783842239. The next prime is 72783842333. The reversal of 72783842331 is 13324838727.

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

It is a de Polignac number, because none of the positive numbers 2^k-72783842331 is a prime.

It is a super-2 number, since 2×72783842331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72783842333) 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, 12130640386 + ... + 12130640391.

It is an arithmetic number, because the mean of its divisors is an integer number (24261280778).

Almost surely, 2^72783842331 is an apocalyptic number.

72783842331 is a deficient number, since it is larger than the sum of its proper divisors (24261280781).

72783842331 is a wasteful number, since it uses less digits than its factorization.

72783842331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24261280780.

The product of its digits is 1354752, while the sum is 48.

The spelling of 72783842331 in words is "seventy-two billion, seven hundred eighty-three million, eight hundred forty-two thousand, three hundred thirty-one".