72645164024 has 32 divisors (see below), whose sum is σ = 141074892000. Its totient is φ = 35028185472.

The previous prime is 72645164021. The next prime is 72645164041. The reversal of 72645164024 is 42046154627.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72645164021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8042 + ... + 381254.

It is an arithmetic number, because the mean of its divisors is an integer number (4408590375).

Almost surely, 2^72645164024 is an apocalyptic number.

It is an amenable number.

72645164024 is a deficient number, since it is larger than the sum of its proper divisors (68429727976).

72645164024 is a wasteful number, since it uses less digits than its factorization.

72645164024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374087 (or 374083 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 72645164024 in words is "seventy-two billion, six hundred forty-five million, one hundred sixty-four thousand, twenty-four".