72240648687 has 32 divisors (see below), whose sum is σ = 111870466560. Its totient is φ = 45986434560.

The previous prime is 72240648673. The next prime is 72240648707. The reversal of 72240648687 is 78684604227.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-72240648687 is a prime.

It is a super-2 number, since 2×72240648687² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72240648617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257512 + ... + 459122.

It is an arithmetic number, because the mean of its divisors is an integer number (3495952080).

Almost surely, 2^72240648687 is an apocalyptic number.

72240648687 is a deficient number, since it is larger than the sum of its proper divisors (39629817873).

72240648687 is a wasteful number, since it uses less digits than its factorization.

72240648687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202220 (or 202214 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The spelling of 72240648687 in words is "seventy-two billion, two hundred forty million, six hundred forty-eight thousand, six hundred eighty-seven".