72996417497 has 4 divisors (see below), whose sum is σ = 73002234036. Its totient is φ = 72990600960.

The previous prime is 72996417479. The next prime is 72996417553. The reversal of 72996417497 is 79471469927.

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 49335517456 + 23660900041 = 222116^2 + 153821^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72996417497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72996417397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2889404 + ... + 2914557.

It is an arithmetic number, because the mean of its divisors is an integer number (18250558509).

Almost surely, 2^72996417497 is an apocalyptic number.

It is an amenable number.

72996417497 is a deficient number, since it is larger than the sum of its proper divisors (5816539).

72996417497 is a wasteful number, since it uses less digits than its factorization.

72996417497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5816538.

The product of its digits is 48009024, while the sum is 65.

The spelling of 72996417497 in words is "seventy-two billion, nine hundred ninety-six million, four hundred seventeen thousand, four hundred ninety-seven".