73239642647 has 8 divisors (see below), whose sum is σ = 76443609600. Its totient is φ = 70037311960.

The previous prime is 73239642631. The next prime is 73239642659. The reversal of 73239642647 is 74624693237.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73239642647 - 2⁴ = 73239642631 is a prime.

It is a super-2 number, since 2×73239642647² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73239641647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317147 + ... + 497052.

It is an arithmetic number, because the mean of its divisors is an integer number (9555451200).

Almost surely, 2^73239642647 is an apocalyptic number.

73239642647 is a deficient number, since it is larger than the sum of its proper divisors (3203966953).

73239642647 is a wasteful number, since it uses less digits than its factorization.

73239642647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818133.

The product of its digits is 9144576, while the sum is 53.

The spelling of 73239642647 in words is "seventy-three billion, two hundred thirty-nine million, six hundred forty-two thousand, six hundred forty-seven".