8799779978 has 64 divisors (see below), whose sum is σ = 14956254720. Its totient is φ = 3848644800.

The previous prime is 8799779977. The next prime is 8799779993.

8799779978 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×8799779978² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8799779977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26585273 + ... + 26585603.

It is an arithmetic number, because the mean of its divisors is an integer number (233691480).

Almost surely, 2^8799779978 is an apocalyptic number.

8799779978 is a deficient number, since it is larger than the sum of its proper divisors (6156474742).

8799779978 is a wasteful number, since it uses less digits than its factorization.

8799779978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 1008189504, while the sum is 80.

The square root of 8799779978 is about 93807.1424679379. The cubic root of 8799779978 is about 2064.5430243803.

The spelling of 8799779978 in words is "eight billion, seven hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred seventy-eight".