72818874695233 has 4 divisors (see below), whose sum is σ = 72819410606788. Its totient is φ = 72818338783680.

The previous prime is 72818874695173. The next prime is 72818874695257. The reversal of 72818874695233 is 33259647881827.

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 57417778812304 + 15401095882929 = 7577452^2 + 3924423^2 .

It is a cyclic number.

It is not a de Polignac number, because 72818874695233 - 2³³ = 72810284760641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72818874698233) 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, 267751908 + ... + 268023733.

It is an arithmetic number, because the mean of its divisors is an integer number (18204852651697).

Almost surely, 2^{72818874695233} is an apocalyptic number.

It is an amenable number.

72818874695233 is a deficient number, since it is larger than the sum of its proper divisors (535911555).

72818874695233 is a wasteful number, since it uses less digits than its factorization.

72818874695233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535911554.

The product of its digits is 975421440, while the sum is 73.

The spelling of 72818874695233 in words is "seventy-two trillion, eight hundred eighteen billion, eight hundred seventy-four million, six hundred ninety-five thousand, two hundred thirty-three".