1244889108551 has 8 divisors (see below), whose sum is σ = 1358094816000. Its totient is φ = 1131689062840.

The previous prime is 1244889108517. The next prime is 1244889108557. The reversal of 1244889108551 is 1558019884421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244889108551 is a prime.

It is a super-2 number, since 2×1244889108551² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244889108557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949001 + ... + 1841298.

It is an arithmetic number, because the mean of its divisors is an integer number (169761852000).

Almost surely, 2^{1244889108551} is an apocalyptic number.

1244889108551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1244889108551 is a deficient number, since it is larger than the sum of its proper divisors (113205707449).

1244889108551 is a wasteful number, since it uses less digits than its factorization.

1244889108551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830869.

The product of its (nonzero) digits is 3686400, while the sum is 56.

The spelling of 1244889108551 in words is "one trillion, two hundred forty-four billion, eight hundred eighty-nine million, one hundred eight thousand, five hundred fifty-one".