72423908459 has 4 divisors (see below), whose sum is σ = 82770181104. Its totient is φ = 62077635816.

The previous prime is 72423908411. The next prime is 72423908489. The reversal of 72423908459 is 95480932427.

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

It is not a de Polignac number, because 72423908459 - 2⁸ = 72423908203 is a prime.

It is a super-2 number, since 2×72423908459² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72423908459.

It is not an unprimeable number, because it can be changed into a prime (72423908489) 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, 5173136312 + ... + 5173136325.

It is an arithmetic number, because the mean of its divisors is an integer number (20692545276).

Almost surely, 2^72423908459 is an apocalyptic number.

72423908459 is a deficient number, since it is larger than the sum of its proper divisors (10346272645).

72423908459 is a wasteful number, since it uses less digits than its factorization.

72423908459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346272644.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 72423908459 in words is "seventy-two billion, four hundred twenty-three million, nine hundred eight thousand, four hundred fifty-nine".