1004020551644 has 12 divisors (see below), whose sum is σ = 1916766507768. Its totient is φ = 456372978000.

The previous prime is 1004020551637. The next prime is 1004020551691. The reversal of 1004020551644 is 4461550204001.

It is a super-2 number, since 2×1004020551644² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1004020551644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11409324407 + ... + 11409324494.

It is an arithmetic number, because the mean of its divisors is an integer number (159730542314).

Almost surely, 2^{1004020551644} is an apocalyptic number.

It is an amenable number.

1004020551644 is a deficient number, since it is larger than the sum of its proper divisors (912745956124).

1004020551644 is a wasteful number, since it uses less digits than its factorization.

1004020551644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22818648916 (or 22818648914 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 1004020551644 its reverse (4461550204001), we get a palindrome (5465570755645).

The spelling of 1004020551644 in words is "one trillion, four billion, twenty million, five hundred fifty-one thousand, six hundred forty-four".