544163997898 has 4 divisors (see below), whose sum is σ = 816245996850. Its totient is φ = 272081998948.

The previous prime is 544163997889. The next prime is 544163997899. The reversal of 544163997898 is 898799361445.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 451843429249 + 92320568649 = 672193^2 + 303843^2 .

It is a super-2 number, since 2×544163997898² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 544163997898.

It is not an unprimeable number, because it can be changed into a prime (544163997899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136040999473 + ... + 136040999476.

Almost surely, 2^544163997898 is an apocalyptic number.

544163997898 is a deficient number, since it is larger than the sum of its proper divisors (272081998952).

544163997898 is a wasteful number, since it uses less digits than its factorization.

544163997898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272081998951.

The product of its digits is 470292480, while the sum is 73.

The spelling of 544163997898 in words is "five hundred forty-four billion, one hundred sixty-three million, nine hundred ninety-seven thousand, eight hundred ninety-eight".