72143716637 has 4 divisors (see below), whose sum is σ = 73056928320. Its totient is φ = 71230504956.

The previous prime is 72143716627. The next prime is 72143716649. The reversal of 72143716637 is 73661734127.

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.

It is a cyclic number.

It is not a de Polignac number, because 72143716637 - 2¹⁰ = 72143715613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72143716591 and 72143716600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143716607) 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, 456605723 + ... + 456605880.

It is an arithmetic number, because the mean of its divisors is an integer number (18264232080).

Almost surely, 2^72143716637 is an apocalyptic number.

It is an amenable number.

72143716637 is a deficient number, since it is larger than the sum of its proper divisors (913211683).

72143716637 is an equidigital number, since it uses as much as digits as its factorization.

72143716637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913211682.

The product of its digits is 889056, while the sum is 47.

The spelling of 72143716637 in words is "seventy-two billion, one hundred forty-three million, seven hundred sixteen thousand, six hundred thirty-seven".