72935865073 has 4 divisors (see below), whose sum is σ = 73001991168. Its totient is φ = 72869738980.

The previous prime is 72935865061. The next prime is 72935865091. The reversal of 72935865073 is 37056853927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37056853927 = 19 ⋅1950360733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72935865073 is a prime.

It is a super-2 number, since 2×72935865073² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72935865043) 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, 33061393 + ... + 33063598.

It is an arithmetic number, because the mean of its divisors is an integer number (18250497792).

Almost surely, 2^72935865073 is an apocalyptic number.

It is an amenable number.

72935865073 is a deficient number, since it is larger than the sum of its proper divisors (66126095).

72935865073 is a wasteful number, since it uses less digits than its factorization.

72935865073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66126094.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 72935865073 in words is "seventy-two billion, nine hundred thirty-five million, eight hundred sixty-five thousand, seventy-three".