72245156840 has 32 divisors (see below), whose sum is σ = 163033982280. Its totient is φ = 28812306432.

The previous prime is 72245156839. The next prime is 72245156843. The reversal of 72245156840 is 4865154227.

It can be written as a sum of positive squares in 4 ways, for example, as 56236328164 + 16008828676 = 237142^2 + 126526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72245156791 and 72245156800.

It is not an unprimeable number, because it can be changed into a prime (72245156843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2666237 + ... + 2693196.

Almost surely, 2^72245156840 is an apocalyptic number.

It is an amenable number.

72245156840 is an abundant number, since it is smaller than the sum of its proper divisors (90788825440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72245156840 is a wasteful number, since it uses less digits than its factorization.

72245156840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359781 (or 5359777 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 72245156840 in words is "seventy-two billion, two hundred forty-five million, one hundred fifty-six thousand, eight hundred forty".