2164641265616 has 20 divisors (see below), whose sum is σ = 4414728897600. Its totient is φ = 1025356388832.

The previous prime is 2164641265603. The next prime is 2164641265781. The reversal of 2164641265616 is 6165621464612.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560264936 + ... + 3560265543.

It is an arithmetic number, because the mean of its divisors is an integer number (220736444880).

Almost surely, 2^{2164641265616} is an apocalyptic number.

It is an amenable number.

2164641265616 is an abundant number, since it is smaller than the sum of its proper divisors (2250087631984).

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

2164641265616 is a wasteful number, since it uses less digits than its factorization.

2164641265616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7120530506 (or 7120530500 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 50.

The spelling of 2164641265616 in words is "two trillion, one hundred sixty-four billion, six hundred forty-one million, two hundred sixty-five thousand, six hundred sixteen".