545145198838 has 4 divisors (see below), whose sum is σ = 817717798260. Its totient is φ = 272572599418.

The previous prime is 545145198833. The next prime is 545145198853. The reversal of 545145198838 is 838891541545.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838891541545 = 5 ⋅167778308309.

It is a super-2 number, since 2×545145198838² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545145198833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136286299708 + ... + 136286299711.

It is an arithmetic number, because the mean of its divisors is an integer number (204429449565).

Almost surely, 2^545145198838 is an apocalyptic number.

545145198838 is a deficient number, since it is larger than the sum of its proper divisors (272572599422).

545145198838 is a wasteful number, since it uses less digits than its factorization.

545145198838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272572599421.

The product of its digits is 27648000, while the sum is 61.

The spelling of 545145198838 in words is "five hundred forty-five billion, one hundred forty-five million, one hundred ninety-eight thousand, eight hundred thirty-eight".