1641320621606 has 32 divisors (see below), whose sum is σ = 2682247932000. Its totient is φ = 750287446272.

The previous prime is 1641320621597. The next prime is 1641320621623. The reversal of 1641320621606 is 6061260231461.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1641320621606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1868930 + ... + 2602986.

It is an arithmetic number, because the mean of its divisors is an integer number (83820247875).

Almost surely, 2^{1641320621606} is an apocalyptic number.

1641320621606 is a deficient number, since it is larger than the sum of its proper divisors (1040927310394).

1641320621606 is a wasteful number, since it uses less digits than its factorization.

1641320621606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736136.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 1641320621606 in words is "one trillion, six hundred forty-one billion, three hundred twenty million, six hundred twenty-one thousand, six hundred six".