72240506273 has 6 divisors (see below), whose sum is σ = 78224927094. Its totient is φ = 66683544096.

The previous prime is 72240506267. The next prime is 72240506281. The reversal of 72240506273 is 37260504227.

It can be written as a sum of positive squares in 3 ways, for example, as 5362925824 + 66877580449 = 73232^2 + 258607^2 .

It is not a de Polignac number, because 72240506273 - 2⁴ = 72240506257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72240506243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213729140 + ... + 213729477.

It is an arithmetic number, because the mean of its divisors is an integer number (13037487849).

Almost surely, 2^72240506273 is an apocalyptic number.

It is an amenable number.

72240506273 is a deficient number, since it is larger than the sum of its proper divisors (5984420821).

72240506273 is a wasteful number, since it uses less digits than its factorization.

72240506273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427458643 (or 427458630 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 38.

The spelling of 72240506273 in words is "seventy-two billion, two hundred forty million, five hundred six thousand, two hundred seventy-three".