438198188125 has 10 divisors (see below), whose sum is σ = 547572456662. Its totient is φ = 350558550000.

The previous prime is 438198188107. The next prime is 438198188161. The reversal of 438198188125 is 521881891834.

It can be written as a sum of positive squares in 5 ways, for example, as 156573741636 + 281624446489 = 395694^2 + 530683^2 .

It is not a de Polignac number, because 438198188125 - 2⁵ = 438198188093 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 438198188125.

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 350557926 + ... + 350559175.

Almost surely, 2^438198188125 is an apocalyptic number.

It is an amenable number.

438198188125 is a deficient number, since it is larger than the sum of its proper divisors (109374268537).

438198188125 is an frugal number, since it uses more digits than its factorization.

438198188125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701117121 (or 701117106 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 58.

The spelling of 438198188125 in words is "four hundred thirty-eight billion, one hundred ninety-eight million, one hundred eighty-eight thousand, one hundred twenty-five".