1681364806 has 16 divisors (see below), whose sum is σ = 2752448400. Its totient is φ = 763944480.

The previous prime is 1681364803. The next prime is 1681364849. The reversal of 1681364806 is 6084631861.

It is a happy number.

It is a super-2 number, since 2×1681364806² = 5653975221710835272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681364803) 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, 44620 + ... + 73168.

It is an arithmetic number, because the mean of its divisors is an integer number (172028025).

Almost surely, 2^1681364806 is an apocalyptic number.

1681364806 is a deficient number, since it is larger than the sum of its proper divisors (1071083594).

1681364806 is a wasteful number, since it uses less digits than its factorization.

1681364806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31239.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1681364806 is about 41004.4486123152. The cubic root of 1681364806 is about 1189.1062200989.

The spelling of 1681364806 in words is "one billion, six hundred eighty-one million, three hundred sixty-four thousand, eight hundred six".