72173567069 has 4 divisors (see below), whose sum is σ = 72182136000. Its totient is φ = 72164998140.

The previous prime is 72173567057. The next prime is 72173567083. The reversal of 72173567069 is 96076537127.

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 72173567069 - 2²⁰ = 72172518493 is a prime.

It is a super-2 number, since 2×72173567069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72173567069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72173567369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4271819 + ... + 4288680.

It is an arithmetic number, because the mean of its divisors is an integer number (18045534000).

Almost surely, 2^72173567069 is an apocalyptic number.

It is an amenable number.

72173567069 is a deficient number, since it is larger than the sum of its proper divisors (8568931).

72173567069 is an equidigital number, since it uses as much as digits as its factorization.

72173567069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8568930.

The product of its (nonzero) digits is 3333960, while the sum is 53.

The spelling of 72173567069 in words is "seventy-two billion, one hundred seventy-three million, five hundred sixty-seven thousand, sixty-nine".