7942171791 has 16 divisors (see below), whose sum is σ = 11062195200. Its totient is φ = 5058973920.

The previous prime is 7942171763. The next prime is 7942171799. The reversal of 7942171791 is 1971712497.

It is not a de Polignac number, because 7942171791 - 2¹¹ = 7942169743 is a prime.

It is a super-2 number, since 2×7942171791² (a number of 21 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 7942171791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7942171799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316 + ... + 126033.

It is an arithmetic number, because the mean of its divisors is an integer number (691387200).

Almost surely, 2^7942171791 is an apocalyptic number.

7942171791 is a deficient number, since it is larger than the sum of its proper divisors (3120023409).

7942171791 is a wasteful number, since it uses less digits than its factorization.

7942171791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127286.

The product of its digits is 222264, while the sum is 48.

The square root of 7942171791 is about 89118.8632725979. The cubic root of 7942171791 is about 1995.1693242631.

The spelling of 7942171791 in words is "seven billion, nine hundred forty-two million, one hundred seventy-one thousand, seven hundred ninety-one".