44891863129 has 3 divisors (see below), whose sum is σ = 44892075007. Its totient is φ = 44891651252.

The previous prime is 44891863123. The next prime is 44891863171. The reversal of 44891863129 is 92136819844.

The square root of 44891863129 is 211877.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12039575625 + 32852287504 = 109725^2 + 181252^2 .

It is not a de Polignac number, because 44891863129 - 2³⁵ = 10532124761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44891863129.

It is not an unprimeable number, because it can be changed into a prime (44891863123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 105939 + ... + 317815.

Almost surely, 2^44891863129 is an apocalyptic number.

44891863129 is the 211877-th square number.

44891863129 is the 105939-th centered octagonal number.

It is an amenable number.

44891863129 is a deficient number, since it is larger than the sum of its proper divisors (211878).

44891863129 is an frugal number, since it uses more digits than its factorization.

44891863129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423754 (or 211877 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The spelling of 44891863129 in words is "forty-four billion, eight hundred ninety-one million, eight hundred sixty-three thousand, one hundred twenty-nine".