72206080129 has 4 divisors (see below), whose sum is σ = 72206897584. Its totient is φ = 72205262676.

The previous prime is 72206080127. The next prime is 72206080169. The reversal of 72206080129 is 92108060227.

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 not a de Polignac number, because 72206080129 - 2¹ = 72206080127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72206080127) 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, 257607 + ... + 459100.

It is an arithmetic number, because the mean of its divisors is an integer number (18051724396).

Almost surely, 2^72206080129 is an apocalyptic number.

It is an amenable number.

72206080129 is a deficient number, since it is larger than the sum of its proper divisors (817455).

72206080129 is a wasteful number, since it uses less digits than its factorization.

72206080129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817454.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 72206080129 in words is "seventy-two billion, two hundred six million, eighty thousand, one hundred twenty-nine".