71549798842838 has 4 divisors (see below), whose sum is σ = 107324698264260. Its totient is φ = 35774899421418.

The previous prime is 71549798842831. The next prime is 71549798842889. The reversal of 71549798842838 is 83824889794517.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71549798842831) by changing a digit.

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 as a sum of consecutive naturals, namely, 17887449710708 + ... + 17887449710711.

It is an arithmetic number, because the mean of its divisors is an integer number (26831174566065).

Almost surely, 2^{71549798842838} is an apocalyptic number.

71549798842838 is a deficient number, since it is larger than the sum of its proper divisors (35774899421422).

71549798842838 is a wasteful number, since it uses less digits than its factorization.

71549798842838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35774899421421.

The product of its digits is 7803371520, while the sum is 83.

The spelling of 71549798842838 in words is "seventy-one trillion, five hundred forty-nine billion, seven hundred ninety-eight million, eight hundred forty-two thousand, eight hundred thirty-eight".