72266324465 has 4 divisors (see below), whose sum is σ = 86719589364. Its totient is φ = 57813059568.

The previous prime is 72266324443. The next prime is 72266324489. The reversal of 72266324465 is 56442366227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19811125504 + 52455198961 = 140752^2 + 229031^2 .

It is a cyclic number.

It is not a de Polignac number, because 72266324465 - 2¹⁶ = 72266258929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7226632442 + ... + 7226632451.

It is an arithmetic number, because the mean of its divisors is an integer number (21679897341).

Almost surely, 2^72266324465 is an apocalyptic number.

It is an amenable number.

72266324465 is a deficient number, since it is larger than the sum of its proper divisors (14453264899).

72266324465 is a wasteful number, since it uses less digits than its factorization.

72266324465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14453264898.

The product of its digits is 2903040, while the sum is 47.

The spelling of 72266324465 in words is "seventy-two billion, two hundred sixty-six million, three hundred twenty-four thousand, four hundred sixty-five".