1661604622862 has 16 divisors (see below), whose sum is σ = 2534735412720. Its totient is φ = 816693755328.

The previous prime is 1661604622849. The next prime is 1661604622883. The reversal of 1661604622862 is 2682264061661.

It is a self number, because there is not a number n which added to its sum of digits gives 1661604622862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3593048 + ... + 4029044.

It is an arithmetic number, because the mean of its divisors is an integer number (158420963295).

Almost surely, 2^{1661604622862} is an apocalyptic number.

1661604622862 is a deficient number, since it is larger than the sum of its proper divisors (873130789858).

1661604622862 is a wasteful number, since it uses less digits than its factorization.

1661604622862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468355.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 1661604622862 in words is "one trillion, six hundred sixty-one billion, six hundred four million, six hundred twenty-two thousand, eight hundred sixty-two".