72704198997 has 16 divisors (see below), whose sum is σ = 110001626880. Its totient is φ = 47438199936.

The previous prime is 72704198993. The next prime is 72704198999. The reversal of 72704198997 is 79989140727.

72704198997 is a `hidden beast` number, since 72 + 70 + 419 + 89 + 9 + 7 = 666.

It is not a de Polignac number, because 72704198997 - 2² = 72704198993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72704198993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28644988 + ... + 28647525.

It is an arithmetic number, because the mean of its divisors is an integer number (6875101680).

Almost surely, 2^72704198997 is an apocalyptic number.

It is an amenable number.

72704198997 is a deficient number, since it is larger than the sum of its proper divisors (37297427883).

72704198997 is a wasteful number, since it uses less digits than its factorization.

72704198997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57292569 (or 57292563 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 63.

The spelling of 72704198997 in words is "seventy-two billion, seven hundred four million, one hundred ninety-eight thousand, nine hundred ninety-seven".