544189145864 has 96 divisors (see below), whose sum is σ = 1283831098200. Its totient is φ = 214343055360.

The previous prime is 544189145821. The next prime is 544189145873. The reversal of 544189145864 is 468541981445.

It can be written as a sum of positive squares in 4 ways, for example, as 403151343364 + 141037802500 = 634942^2 + 375550^2 .

It is a super-2 number, since 2×544189145864² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 933824 + ... + 1400144.

Almost surely, 2^544189145864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 544189145864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641915549100).

544189145864 is an abundant number, since it is smaller than the sum of its proper divisors (739641952336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

544189145864 is a wasteful number, since it uses less digits than its factorization.

544189145864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466583 (or 466572 counting only the distinct ones).

The product of its digits is 22118400, while the sum is 59.

The spelling of 544189145864 in words is "five hundred forty-four billion, one hundred eighty-nine million, one hundred forty-five thousand, eight hundred sixty-four".