11913734217 has 128 divisors (see below), whose sum is σ = 21970944000. Its totient is φ = 5670907200.

The previous prime is 11913734213. The next prime is 11913734227. The reversal of 11913734217 is 71243731911.

It is not a de Polignac number, because 11913734217 - 2² = 11913734213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11913734213) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6665998 + ... + 6667784.

It is an arithmetic number, because the mean of its divisors is an integer number (171648000).

Almost surely, 2^11913734217 is an apocalyptic number.

It is an amenable number.

11913734217 is a deficient number, since it is larger than the sum of its proper divisors (10057209783).

11913734217 is a wasteful number, since it uses less digits than its factorization.

11913734217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872 (or 1858 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The spelling of 11913734217 in words is "eleven billion, nine hundred thirteen million, seven hundred thirty-four thousand, two hundred seventeen".