216381317934 has 16 divisors (see below), whose sum is σ = 446722721280. Its totient is φ = 69800425080.

The previous prime is 216381317927. The next prime is 216381317941. The reversal of 216381317934 is 439713183612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216381317927) and next prime (216381317941).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581670024 + ... + 581670395.

It is an arithmetic number, because the mean of its divisors is an integer number (27920170080).

Almost surely, 2^216381317934 is an apocalyptic number.

216381317934 is an abundant number, since it is smaller than the sum of its proper divisors (230341403346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216381317934 is a wasteful number, since it uses less digits than its factorization.

216381317934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163340455.

The product of its digits is 653184, while the sum is 48.

The spelling of 216381317934 in words is "two hundred sixteen billion, three hundred eighty-one million, three hundred seventeen thousand, nine hundred thirty-four".