538149195243 has 24 divisors (see below), whose sum is σ = 848044866240. Its totient is φ = 326130952560.

The previous prime is 538149195211. The next prime is 538149195263. The reversal of 538149195243 is 342591941835.

538149195243 is a `hidden beast` number, since 5 + 381 + 4 + 9 + 19 + 5 + 243 = 666.

It is not a de Polignac number, because 538149195243 - 2⁵ = 538149195211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538149195243.

It is not an unprimeable number, because it can be changed into a prime (538149195203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1536448 + ... + 1853906.

It is an arithmetic number, because the mean of its divisors is an integer number (35335202760).

Almost surely, 2^538149195243 is an apocalyptic number.

538149195243 is a deficient number, since it is larger than the sum of its proper divisors (309895670997).

538149195243 is a wasteful number, since it uses less digits than its factorization.

538149195243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334599 (or 334596 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 538149195243 in words is "five hundred thirty-eight billion, one hundred forty-nine million, one hundred ninety-five thousand, two hundred forty-three".