71707163781 has 8 divisors (see below), whose sum is σ = 104301329184. Its totient is φ = 43458887120.

The previous prime is 71707163771. The next prime is 71707163821. The reversal of 71707163781 is 18736170717.

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

It is not a de Polignac number, because 71707163781 - 2²² = 71702969477 is a prime.

It is a super-2 number, since 2×71707163781² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71707163781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71707163771) 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, 1086472146 + ... + 1086472211.

It is an arithmetic number, because the mean of its divisors is an integer number (13037666148).

Almost surely, 2^71707163781 is an apocalyptic number.

It is an amenable number.

71707163781 is a deficient number, since it is larger than the sum of its proper divisors (32594165403).

71707163781 is a wasteful number, since it uses less digits than its factorization.

71707163781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172944371.

The product of its (nonzero) digits is 345744, while the sum is 48.

The spelling of 71707163781 in words is "seventy-one billion, seven hundred seven million, one hundred sixty-three thousand, seven hundred eighty-one".