1641264003644 has 6 divisors (see below), whose sum is σ = 2872212006384. Its totient is φ = 820632001820.

The previous prime is 1641264003583. The next prime is 1641264003667. The reversal of 1641264003644 is 4463004621461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205158000452 + ... + 205158000459.

It is an arithmetic number, because the mean of its divisors is an integer number (478702001064).

Almost surely, 2^{1641264003644} is an apocalyptic number.

It is an amenable number.

1641264003644 is a deficient number, since it is larger than the sum of its proper divisors (1230948002740).

1641264003644 is a wasteful number, since it uses less digits than its factorization.

1641264003644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410316000915 (or 410316000913 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 1641264003644 in words is "one trillion, six hundred forty-one billion, two hundred sixty-four million, three thousand, six hundred forty-four".