71850393198 has 32 divisors (see below), whose sum is σ = 168071097600. Its totient is φ = 22689597528.

The previous prime is 71850393193. The next prime is 71850393229. The reversal of 71850393198 is 89139305817.

71850393198 is a `hidden beast` number, since 7 + 18 + 50 + 393 + 198 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71850393193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35013786 + ... + 35015837.

It is an arithmetic number, because the mean of its divisors is an integer number (5252221800).

Almost surely, 2^71850393198 is an apocalyptic number.

71850393198 is an abundant number, since it is smaller than the sum of its proper divisors (96220704402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71850393198 is a wasteful number, since it uses less digits than its factorization.

71850393198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70029653 (or 70029647 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 71850393198 in words is "seventy-one billion, eight hundred fifty million, three hundred ninety-three thousand, one hundred ninety-eight".