71906638170 has 16 divisors (see below), whose sum is σ = 172575931680. Its totient is φ = 19175103504.

The previous prime is 71906638169. The next prime is 71906638207. The reversal of 71906638170 is 7183660917.

It is a happy number.

It is a super-2 number, since 2×71906638170² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1198443940 + ... + 1198443999.

It is an arithmetic number, because the mean of its divisors is an integer number (10785995730).

Almost surely, 2^71906638170 is an apocalyptic number.

71906638170 is an abundant number, since it is smaller than the sum of its proper divisors (100669293510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71906638170 is a wasteful number, since it uses less digits than its factorization.

71906638170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396887949.

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 71906638170 in words is "seventy-one billion, nine hundred six million, six hundred thirty-eight thousand, one hundred seventy".