518345281444 has 9 divisors (see below), whose sum is σ = 907106762401. Its totient is φ = 259171920760.

The previous prime is 518345281427. The next prime is 518345281499. The reversal of 518345281444 is 444182543815.

The square root of 518345281444 is 719962.

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

It can be written as a sum of positive squares in only one way, i.e., 452172863844 + 66172417600 = 672438^2 + 257240^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1259934 + ... + 1619914.

Almost surely, 2^518345281444 is an apocalyptic number.

518345281444 is the 719962-nd square number.

It is an amenable number.

518345281444 is a deficient number, since it is larger than the sum of its proper divisors (388761480957).

518345281444 is an frugal number, since it uses more digits than its factorization.

518345281444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719966 (or 359983 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 49.

Multiplying 518345281444 by its sum of digits (49), we get a square (25398918790756 = 5039734²).

The spelling of 518345281444 in words is "five hundred eighteen billion, three hundred forty-five million, two hundred eighty-one thousand, four hundred forty-four".