2016906981 has 16 divisors (see below), whose sum is σ = 2835384000. Its totient is φ = 1271749248.

The previous prime is 2016906977. The next prime is 2016907003. The reversal of 2016906981 is 1896096102.

It is not a de Polignac number, because 2016906981 - 2² = 2016906977 is a prime.

It is a super-2 number, since 2×2016906981² = 8135827540013068722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016908981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6495 + ... + 63843.

It is an arithmetic number, because the mean of its divisors is an integer number (177211500).

Almost surely, 2^2016906981 is an apocalyptic number.

It is an amenable number.

2016906981 is a deficient number, since it is larger than the sum of its proper divisors (818477019).

2016906981 is a wasteful number, since it uses less digits than its factorization.

2016906981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57988.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 2016906981 is about 44909.9875417484. The cubic root of 2016906981 is about 1263.4613361729.

The spelling of 2016906981 in words is "two billion, sixteen million, nine hundred six thousand, nine hundred eighty-one".