72209593129 has 4 divisors (see below), whose sum is σ = 72210378240. Its totient is φ = 72208808020.

The previous prime is 72209593037. The next prime is 72209593147. The reversal of 72209593129 is 92139590227.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72209593129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72209593529) 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, 232969 + ... + 445750.

It is an arithmetic number, because the mean of its divisors is an integer number (18052594560).

Almost surely, 2^72209593129 is an apocalyptic number.

It is an amenable number.

72209593129 is a deficient number, since it is larger than the sum of its proper divisors (785111).

72209593129 is a wasteful number, since it uses less digits than its factorization.

72209593129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785110.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 72209593129 in words is "seventy-two billion, two hundred nine million, five hundred ninety-three thousand, one hundred twenty-nine".