7965817938 has 32 divisors (see below), whose sum is σ = 19063497600. Its totient is φ = 2451020688.

The previous prime is 7965817931. The next prime is 7965817961. The reversal of 7965817938 is 8397185697.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7965817931) 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, 5672958 + ... + 5674361.

It is an arithmetic number, because the mean of its divisors is an integer number (595734300).

Almost surely, 2^7965817938 is an apocalyptic number.

7965817938 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7965817938 is an abundant number, since it is smaller than the sum of its proper divisors (11097679662).

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

7965817938 is a wasteful number, since it uses less digits than its factorization.

7965817938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11347343 (or 11347337 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 7965817938 is about 89251.4310137378. The cubic root of 7965817938 is about 1997.1474281847.

The spelling of 7965817938 in words is "seven billion, nine hundred sixty-five million, eight hundred seventeen thousand, nine hundred thirty-eight".