2643123121662 has 64 divisors (see below), whose sum is σ = 5876391006720. Its totient is φ = 788296126464.

The previous prime is 2643123121651. The next prime is 2643123121699. The reversal of 2643123121662 is 2661213213462.

It is a self number, because there is not a number n which added to its sum of digits gives 2643123121662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3073587 + ... + 3838382.

It is an arithmetic number, because the mean of its divisors is an integer number (91818609480).

Almost surely, 2^{2643123121662} is an apocalyptic number.

2643123121662 is an abundant number, since it is smaller than the sum of its proper divisors (3233267885058).

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

2643123121662 is a wasteful number, since it uses less digits than its factorization.

2643123121662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912177.

The product of its digits is 124416, while the sum is 39.

The spelling of 2643123121662 in words is "two trillion, six hundred forty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, six hundred sixty-two".