2163605061566 has 24 divisors (see below), whose sum is σ = 3514864224024. Its totient is φ = 998414670240.

The previous prime is 2163605061521. The next prime is 2163605061587. The reversal of 2163605061566 is 6651605063612.

It is a self number, because there is not a number n which added to its sum of digits gives 2163605061566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1420256 + ... + 2518796.

It is an arithmetic number, because the mean of its divisors is an integer number (146452676001).

Almost surely, 2^{2163605061566} is an apocalyptic number.

2163605061566 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2163605061566 is a deficient number, since it is larger than the sum of its proper divisors (1351259162458).

2163605061566 is a wasteful number, since it uses less digits than its factorization.

2163605061566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104396 (or 1104383 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 2163605061566 in words is "two trillion, one hundred sixty-three billion, six hundred five million, sixty-one thousand, five hundred sixty-six".