71884792221 has 32 divisors (see below), whose sum is σ = 105163508736. Its totient is φ = 43315680000.

The previous prime is 71884792201. The next prime is 71884792267. The reversal of 71884792221 is 12229748817.

It is not a de Polignac number, because 71884792221 - 2²² = 71880597917 is a prime.

It is a super-2 number, since 2×71884792221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71884792201) 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 31 ways as a sum of consecutive naturals, for example, 4106730 + ... + 4124196.

It is an arithmetic number, because the mean of its divisors is an integer number (3286359648).

Almost surely, 2^71884792221 is an apocalyptic number.

It is an amenable number.

71884792221 is a deficient number, since it is larger than the sum of its proper divisors (33278716515).

71884792221 is a wasteful number, since it uses less digits than its factorization.

71884792221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18193.

The product of its digits is 903168, while the sum is 51.

The spelling of 71884792221 in words is "seventy-one billion, eight hundred eighty-four million, seven hundred ninety-two thousand, two hundred twenty-one".