72345487664 has 20 divisors (see below), whose sum is σ = 140714796504. Its totient is φ = 36031991808.

The previous prime is 72345487637. The next prime is 72345487667. The reversal of 72345487664 is 46678454327.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (72345487667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8792762 + ... + 8800985.

Almost surely, 2^72345487664 is an apocalyptic number.

It is an amenable number.

72345487664 is a deficient number, since it is larger than the sum of its proper divisors (68369308840).

72345487664 is a wasteful number, since it uses less digits than its factorization.

72345487664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17594012 (or 17594006 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 56.

It can be divided in two parts, 723454 and 87664, that added together give a palindrome (811118).

The spelling of 72345487664 in words is "seventy-two billion, three hundred forty-five million, four hundred eighty-seven thousand, six hundred sixty-four".