7817138376 has 32 divisors (see below), whose sum is σ = 19725495840. Its totient is φ = 2581359488.

The previous prime is 7817138353. The next prime is 7817138377. The reversal of 7817138376 is 6738317187.

It is a happy number.

It is a super-2 number, since 2×7817138376² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7817138377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519461 + ... + 1524596.

It is an arithmetic number, because the mean of its divisors is an integer number (616421745).

Almost surely, 2^7817138376 is an apocalyptic number.

It is an amenable number.

7817138376 is an abundant number, since it is smaller than the sum of its proper divisors (11908357464).

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

7817138376 is a wasteful number, since it uses less digits than its factorization.

7817138376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044173 (or 3044169 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 7817138376 is about 88414.5823719142. The cubic root of 7817138376 is about 1984.6439286276.

The spelling of 7817138376 in words is "seven billion, eight hundred seventeen million, one hundred thirty-eight thousand, three hundred seventy-six".