72218276669 has 12 divisors (see below), whose sum is σ = 91646199648. Its totient is φ = 56273981400.

The previous prime is 72218276639. The next prime is 72218276707. The reversal of 72218276669 is 96667281227.

It is not a de Polignac number, because 72218276669 - 2⁸ = 72218276413 is a prime.

It is a super-2 number, since 2×72218276669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72218276639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66992297 + ... + 66993374.

It is an arithmetic number, because the mean of its divisors is an integer number (7637183304).

Almost surely, 2^72218276669 is an apocalyptic number.

It is an amenable number.

72218276669 is a deficient number, since it is larger than the sum of its proper divisors (19427922979).

72218276669 is a wasteful number, since it uses less digits than its factorization.

72218276669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133985696 (or 133985689 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 56.

The spelling of 72218276669 in words is "seventy-two billion, two hundred eighteen million, two hundred seventy-six thousand, six hundred sixty-nine".