72287635723 has 4 divisors (see below), whose sum is σ = 72288175840. Its totient is φ = 72287095608.

The previous prime is 72287635691. The next prime is 72287635751. The reversal of 72287635723 is 32753678227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72287635723 - 2⁵ = 72287635691 is a prime.

It is a super-2 number, since 2×72287635723² (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 (72287695723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96973 + ... + 392401.

It is an arithmetic number, because the mean of its divisors is an integer number (18072043960).

Almost surely, 2^72287635723 is an apocalyptic number.

72287635723 is a deficient number, since it is larger than the sum of its proper divisors (540117).

72287635723 is a wasteful number, since it uses less digits than its factorization.

72287635723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540116.

The product of its digits is 5927040, while the sum is 52.

The spelling of 72287635723 in words is "seventy-two billion, two hundred eighty-seven million, six hundred thirty-five thousand, seven hundred twenty-three".