2016815690 has 16 divisors (see below), whose sum is σ = 3642663528. Its totient is φ = 803971776.

The previous prime is 2016815687. The next prime is 2016815693. The reversal of 2016815690 is 965186102.

It is an interprime number because it is at equal distance from previous prime (2016815687) and next prime (2016815693).

It can be written as a sum of positive squares in 4 ways, for example, as 2006233681 + 10582009 = 44791^2 + 3253^2 .

It is a super-2 number, since 2×2016815690² = 8135091054860352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2016815693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341237 + ... + 347096.

Almost surely, 2^2016815690 is an apocalyptic number.

2016815690 is a deficient number, since it is larger than the sum of its proper divisors (1625847838).

2016815690 is a wasteful number, since it uses less digits than its factorization.

2016815690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688633.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 2016815690 is about 44908.9711527663. The cubic root of 2016815690 is about 1263.4422732563.

The spelling of 2016815690 in words is "two billion, sixteen million, eight hundred fifteen thousand, six hundred ninety".