72726925831 has 4 divisors (see below), whose sum is σ = 83116486672. Its totient is φ = 62337364992.

The previous prime is 72726925771. The next prime is 72726925849. The reversal of 72726925831 is 13852962727.

It is a happy number.

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-72726925831 is a prime.

It is a super-2 number, since 2×72726925831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72726928831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5194780410 + ... + 5194780423.

It is an arithmetic number, because the mean of its divisors is an integer number (20779121668).

Almost surely, 2^72726925831 is an apocalyptic number.

72726925831 is a deficient number, since it is larger than the sum of its proper divisors (10389560841).

72726925831 is a wasteful number, since it uses less digits than its factorization.

72726925831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10389560840.

The product of its digits is 2540160, while the sum is 52.

The spelling of 72726925831 in words is "seventy-two billion, seven hundred twenty-six million, nine hundred twenty-five thousand, eight hundred thirty-one".