3186890986813 has 16 divisors (see below), whose sum is σ = 3204896975280. Its totient is φ = 3168948096000.

The previous prime is 3186890986793. The next prime is 3186890986817.

3186890986813 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 8 ways, for example, as 1230087282649 + 1956803704164 = 1109093^2 + 1398858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3186890986813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3186890986817) 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, 215366731 + ... + 215381527.

It is an arithmetic number, because the mean of its divisors is an integer number (200306060955).

Almost surely, 2^{3186890986813} is an apocalyptic number.

It is an amenable number.

3186890986813 is a deficient number, since it is larger than the sum of its proper divisors (18005988467).

3186890986813 is a wasteful number, since it uses less digits than its factorization.

3186890986813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16848.

The product of its (nonzero) digits is 107495424, while the sum is 70.

The spelling of 3186890986813 in words is "three trillion, one hundred eighty-six billion, eight hundred ninety million, nine hundred eighty-six thousand, eight hundred thirteen".