72270756689 has 4 divisors (see below), whose sum is σ = 72537438720. Its totient is φ = 72004074660.

The previous prime is 72270756667. The next prime is 72270756697. The reversal of 72270756689 is 98665707227.

It is a happy number.

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 72270756689 - 2²⁸ = 72002321233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72270752689) 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, 133340609 + ... + 133341150.

It is an arithmetic number, because the mean of its divisors is an integer number (18134359680).

Almost surely, 2^72270756689 is an apocalyptic number.

It is an amenable number.

72270756689 is a deficient number, since it is larger than the sum of its proper divisors (266682031).

72270756689 is a wasteful number, since it uses less digits than its factorization.

72270756689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266682030.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 72270756689 in words is "seventy-two billion, two hundred seventy million, seven hundred fifty-six thousand, six hundred eighty-nine".