1681116215 has 16 divisors (see below), whose sum is σ = 2058376320. Its totient is φ = 1317811200.

The previous prime is 1681116187. The next prime is 1681116221. The reversal of 1681116215 is 5126111861.

It is not a de Polignac number, because 1681116215 - 2²⁰ = 1680067639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31826 + ... + 66144.

It is an arithmetic number, because the mean of its divisors is an integer number (128648520).

Almost surely, 2^1681116215 is an apocalyptic number.

1681116215 is a deficient number, since it is larger than the sum of its proper divisors (377260105).

1681116215 is a wasteful number, since it uses less digits than its factorization.

1681116215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34522.

The product of its digits is 2880, while the sum is 32.

The square root of 1681116215 is about 41001.4172316031. The cubic root of 1681116215 is about 1189.0476138062.

The spelling of 1681116215 in words is "one billion, six hundred eighty-one million, one hundred sixteen thousand, two hundred fifteen".