72804408778 has 24 divisors (see below), whose sum is σ = 113389039296. Its totient is φ = 35043460560.

The previous prime is 72804408773. The next prime is 72804408847. The reversal of 72804408778 is 87780440827.

It is not an unprimeable number, because it can be changed into a prime (72804408773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245701 + ... + 453847.

It is an arithmetic number, because the mean of its divisors is an integer number (4724543304).

Almost surely, 2^72804408778 is an apocalyptic number.

72804408778 is a deficient number, since it is larger than the sum of its proper divisors (40584630518).

72804408778 is a wasteful number, since it uses less digits than its factorization.

72804408778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208318 (or 208257 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 55.

The spelling of 72804408778 in words is "seventy-two billion, eight hundred four million, four hundred eight thousand, seven hundred seventy-eight".