72459721433 has 12 divisors (see below), whose sum is σ = 83108673984. Its totient is φ = 63008451000.

The previous prime is 72459721429. The next prime is 72459721531. The reversal of 72459721433 is 33412795427.

It is a happy number.

It is not a de Polignac number, because 72459721433 - 2² = 72459721429 is a prime.

It is a super-2 number, since 2×72459721433² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72459721133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13015493 + ... + 13021058.

It is an arithmetic number, because the mean of its divisors is an integer number (6925722832).

Almost surely, 2^72459721433 is an apocalyptic number.

It is an amenable number.

72459721433 is a deficient number, since it is larger than the sum of its proper divisors (10648952551).

72459721433 is a wasteful number, since it uses less digits than its factorization.

72459721433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26036596 (or 26036585 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 47.

The spelling of 72459721433 in words is "seventy-two billion, four hundred fifty-nine million, seven hundred twenty-one thousand, four hundred thirty-three".