7946117881 has 9 divisors (see below), whose sum is σ = 8605631181. Its totient is φ = 7333808352.

The previous prime is 7946117867. The next prime is 7946117887. The reversal of 7946117881 is 1887116497.

It is a happy number.

The square root of 7946117881 is 89141.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6250325481 + 1695792400 = 79059^2 + 41180^2 .

It is not a de Polignac number, because 7946117881 - 2¹¹ = 7946115833 is a prime.

It is a super-2 number, since 2×7946117881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7946117887) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1155405 + ... + 1162261.

Almost surely, 2^7946117881 is an apocalyptic number.

7946117881 is the 89141-st square number.

7946117881 is the 44571-st centered octagonal number.

It is an amenable number.

7946117881 is a deficient number, since it is larger than the sum of its proper divisors (659513300).

7946117881 is an frugal number, since it uses more digits than its factorization.

7946117881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13740 (or 6870 counting only the distinct ones).

The product of its digits is 677376, while the sum is 52.

The cubic root of 7946117881 is about 1995.4997046829.

The spelling of 7946117881 in words is "seven billion, nine hundred forty-six million, one hundred seventeen thousand, eight hundred eighty-one".