72940183297 has 4 divisors (see below), whose sum is σ = 72973938436. Its totient is φ = 72906428160.

The previous prime is 72940183223. The next prime is 72940183313. The reversal of 72940183297 is 79238104927.

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 57928787856 + 15011395441 = 240684^2 + 122521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72940183297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72940184297) by changing a digit.

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, 16874328 + ... + 16878649.

It is an arithmetic number, because the mean of its divisors is an integer number (18243484609).

Almost surely, 2^72940183297 is an apocalyptic number.

It is an amenable number.

72940183297 is a deficient number, since it is larger than the sum of its proper divisors (33755139).

72940183297 is a wasteful number, since it uses less digits than its factorization.

72940183297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33755138.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 72940183297 in words is "seventy-two billion, nine hundred forty million, one hundred eighty-three thousand, two hundred ninety-seven".