71634782131 has 8 divisors (see below), whose sum is σ = 78148998144. Its totient is φ = 65120893320.

The previous prime is 71634782119. The next prime is 71634782213. The reversal of 71634782131 is 13128743617.

It is a happy number.

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 71634782131 - 2⁷ = 71634782003 is a prime.

It is a super-2 number, since 2×71634782131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71634782101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705346 + ... + 800488.

It is an arithmetic number, because the mean of its divisors is an integer number (9768624768).

Almost surely, 2^71634782131 is an apocalyptic number.

71634782131 is a deficient number, since it is larger than the sum of its proper divisors (6514216013).

71634782131 is a wasteful number, since it uses less digits than its factorization.

71634782131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163601.

The product of its digits is 169344, while the sum is 43.

The spelling of 71634782131 in words is "seventy-one billion, six hundred thirty-four million, seven hundred eighty-two thousand, one hundred thirty-one".