71998838971 has 8 divisors (see below), whose sum is σ = 72838366560. Its totient is φ = 71162861952.

The previous prime is 71998838959. The next prime is 71998838999. The reversal of 71998838971 is 17983889917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71998838971 - 2¹³ = 71998830779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71998838971.

It is not an unprimeable number, because it can be changed into a prime (71998838941) 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 in 7 ways as a sum of consecutive naturals, for example, 846840 + ... + 927973.

It is an arithmetic number, because the mean of its divisors is an integer number (9104795820).

Almost surely, 2^71998838971 is an apocalyptic number.

71998838971 is a deficient number, since it is larger than the sum of its proper divisors (839527589).

71998838971 is a wasteful number, since it uses less digits than its factorization.

71998838971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775285.

The product of its digits is 54867456, while the sum is 70.

The spelling of 71998838971 in words is "seventy-one billion, nine hundred ninety-eight million, eight hundred thirty-eight thousand, nine hundred seventy-one".