217393739372 has 12 divisors (see below), whose sum is σ = 380577253896. Its totient is φ = 108657381120.

The previous prime is 217393739369. The next prime is 217393739393. The reversal of 217393739372 is 273937393712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9859754 + ... + 9881777.

It is an arithmetic number, because the mean of its divisors is an integer number (31714771158).

Almost surely, 2^217393739372 is an apocalyptic number.

It is an amenable number.

217393739372 is a deficient number, since it is larger than the sum of its proper divisors (163183514524).

217393739372 is a wasteful number, since it uses less digits than its factorization.

217393739372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19744288 (or 19744286 counting only the distinct ones).

The product of its digits is 9001692, while the sum is 56.

The spelling of 217393739372 in words is "two hundred seventeen billion, three hundred ninety-three million, seven hundred thirty-nine thousand, three hundred seventy-two".