71896729975231 has 8 divisors (see below), whose sum is σ = 86492306737280. Its totient is φ = 58382307047448.

The previous prime is 71896729975211. The next prime is 71896729975243. The reversal of 71896729975231 is 13257992769817.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71896729975231 is a prime.

It is a super-2 number, since 2×71896729975231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71896729975211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270288458421 + ... + 270288458686.

It is an arithmetic number, because the mean of its divisors is an integer number (10811538342160).

Almost surely, 2^{71896729975231} is an apocalyptic number.

71896729975231 is a deficient number, since it is larger than the sum of its proper divisors (14595576762049).

71896729975231 is a wasteful number, since it uses less digits than its factorization.

71896729975231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540576917133.

The product of its digits is 720135360, while the sum is 76.

The spelling of 71896729975231 in words is "seventy-one trillion, eight hundred ninety-six billion, seven hundred twenty-nine million, nine hundred seventy-five thousand, two hundred thirty-one".