1641323726553 has 32 divisors (see below), whose sum is σ = 2582439657472. Its totient is φ = 907399972800.

The previous prime is 1641323726521. The next prime is 1641323726569. The reversal of 1641323726553 is 3556273231461.

It is not a de Polignac number, because 1641323726553 - 2⁵ = 1641323726521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641323726753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2092488 + ... + 2767878.

It is an arithmetic number, because the mean of its divisors is an integer number (80701239296).

Almost surely, 2^{1641323726553} is an apocalyptic number.

It is an amenable number.

1641323726553 is a deficient number, since it is larger than the sum of its proper divisors (941115930919).

1641323726553 is a wasteful number, since it uses less digits than its factorization.

1641323726553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679165.

The product of its digits is 2721600, while the sum is 48.

The spelling of 1641323726553 in words is "one trillion, six hundred forty-one billion, three hundred twenty-three million, seven hundred twenty-six thousand, five hundred fifty-three".