72400728776 has 16 divisors (see below), whose sum is σ = 136394741040. Its totient is φ = 36028797840.

The previous prime is 72400728767. The next prime is 72400728793. The reversal of 72400728776 is 67782700427.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21444026 + ... + 21447401.

It is an arithmetic number, because the mean of its divisors is an integer number (8524671315).

Almost surely, 2^72400728776 is an apocalyptic number.

It is an amenable number.

72400728776 is a deficient number, since it is larger than the sum of its proper divisors (63994012264).

72400728776 is a wasteful number, since it uses less digits than its factorization.

72400728776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42891644 (or 42891640 counting only the distinct ones).

The product of its (nonzero) digits is 1843968, while the sum is 50.

The spelling of 72400728776 in words is "seventy-two billion, four hundred million, seven hundred twenty-eight thousand, seven hundred seventy-six".