72281765555999 has 8 divisors (see below), whose sum is σ = 74532868511472. Its totient is φ = 70063525417600.

The previous prime is 72281765555971. The next prime is 72281765556037. The reversal of 72281765555999 is 99955556718227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72281765555999 - 2¹⁶ = 72281765490463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72281765555959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8215699802 + ... + 8215708599.

It is an arithmetic number, because the mean of its divisors is an integer number (9316608563934).

Almost surely, 2^{72281765555999} is an apocalyptic number.

72281765555999 is a deficient number, since it is larger than the sum of its proper divisors (2251102955473).

72281765555999 is a wasteful number, since it uses less digits than its factorization.

72281765555999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16431408537.

The product of its digits is 4286520000, while the sum is 80.

The spelling of 72281765555999 in words is "seventy-two trillion, two hundred eighty-one billion, seven hundred sixty-five million, five hundred fifty-five thousand, nine hundred ninety-nine".