71216938590 has 48 divisors (see below), whose sum is σ = 198826069392. Its totient is φ = 16278157056.

The previous prime is 71216938579. The next prime is 71216938609. The reversal of 71216938590 is 9583961217.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 24221979 + ... + 24224918.

It is an arithmetic number, because the mean of its divisors is an integer number (4142209779).

Almost surely, 2^71216938590 is an apocalyptic number.

71216938590 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71216938590 is an abundant number, since it is smaller than the sum of its proper divisors (127609130802).

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

71216938590 is a wasteful number, since it uses less digits than its factorization.

71216938590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48446921 (or 48446914 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 71216938590 in words is "seventy-one billion, two hundred sixteen million, nine hundred thirty-eight thousand, five hundred ninety".