72956965897 has 4 divisors (see below), whose sum is σ = 73679312196. Its totient is φ = 72234619600.

The previous prime is 72956965883. The next prime is 72956965901. The reversal of 72956965897 is 79856965927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69795827721 + 3161138176 = 264189^2 + 56224^2 .

It is a cyclic number.

It is not a de Polignac number, because 72956965897 - 2¹⁹ = 72956441609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72956965817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361172998 + ... + 361173199.

It is an arithmetic number, because the mean of its divisors is an integer number (18419828049).

Almost surely, 2^72956965897 is an apocalyptic number.

It is an amenable number.

72956965897 is a deficient number, since it is larger than the sum of its proper divisors (722346299).

72956965897 is a wasteful number, since it uses less digits than its factorization.

72956965897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722346298.

The product of its digits is 514382400, while the sum is 73.

The spelling of 72956965897 in words is "seventy-two billion, nine hundred fifty-six million, nine hundred sixty-five thousand, eight hundred ninety-seven".