7879779786 has 24 divisors (see below), whose sum is σ = 16741127520. Its totient is φ = 2472087232.

The previous prime is 7879779767. The next prime is 7879779793. The reversal of 7879779786 is 6879779787.

It is a super-3 number, since 3×7879779786³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2270406 + ... + 2273873.

It is an arithmetic number, because the mean of its divisors is an integer number (697546980).

Almost surely, 2^7879779786 is an apocalyptic number.

7879779786 is an abundant number, since it is smaller than the sum of its proper divisors (8861347734).

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

7879779786 is a wasteful number, since it uses less digits than its factorization.

7879779786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4544318 (or 4544301 counting only the distinct ones).

The product of its digits is 522764928, while the sum is 75.

The square root of 7879779786 is about 88768.1237044019. The cubic root of 7879779786 is about 1989.9310419444.

Subtracting from 7879779786 its reverse (6879779787), we obtain a palindrome (999999999).

The spelling of 7879779786 in words is "seven billion, eight hundred seventy-nine million, seven hundred seventy-nine thousand, seven hundred eighty-six".