2106512065684 has 72 divisors (see below), whose sum is σ = 4340821512888. Its totient is φ = 890314813440.

The previous prime is 2106512065673. The next prime is 2106512065687. The reversal of 2106512065684 is 4865602156012.

It can be written as a sum of positive squares in 12 ways, for example, as 508765505284 + 1597746560400 = 713278^2 + 1264020^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106512065687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2051857 + ... + 2902264.

It is an arithmetic number, because the mean of its divisors is an integer number (60289187679).

Almost surely, 2^{2106512065684} is an apocalyptic number.

It is an amenable number.

2106512065684 is an abundant number, since it is smaller than the sum of its proper divisors (2234309447204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2106512065684 is a wasteful number, since it uses less digits than its factorization.

2106512065684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954205 (or 4954190 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 2106512065684 in words is "two trillion, one hundred six billion, five hundred twelve million, sixty-five thousand, six hundred eighty-four".