1001644023055 has 32 divisors (see below), whose sum is σ = 1310357155968. Its totient is φ = 730610496000.

The previous prime is 1001644023019. The next prime is 1001644023109. The reversal of 1001644023055 is 5503204461001.

It is a happy number.

It is not a de Polignac number, because 1001644023055 - 2⁹ = 1001644022543 is a prime.

It is a Duffinian number.

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, 2582662 + ... + 2945068.

It is an arithmetic number, because the mean of its divisors is an integer number (40948661124).

Almost surely, 2^{1001644023055} is an apocalyptic number.

1001644023055 is a deficient number, since it is larger than the sum of its proper divisors (308713132913).

1001644023055 is a wasteful number, since it uses less digits than its factorization.

1001644023055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362947.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1001644023055 its reverse (5503204461001), we get a palindrome (6504848484056).

The spelling of 1001644023055 in words is "one trillion, one billion, six hundred forty-four million, twenty-three thousand, fifty-five".