4168861786978 has 16 divisors (see below), whose sum is σ = 7522758112320. Its totient is φ = 1692620575056.

The previous prime is 4168861786961. The next prime is 4168861787047. The reversal of 4168861786978 is 8796871688614.

It is a junction number, because it is equal to n+sod(n) for n = 4168861786898 and 4168861786907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7836206101 + ... + 7836206632.

It is an arithmetic number, because the mean of its divisors is an integer number (470172382020).

Almost surely, 2^{4168861786978} is an apocalyptic number.

4168861786978 is a deficient number, since it is larger than the sum of its proper divisors (3353896325342).

4168861786978 is a wasteful number, since it uses less digits than its factorization.

4168861786978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672412761.

The product of its digits is 1560674304, while the sum is 79.

The spelling of 4168861786978 in words is "four trillion, one hundred sixty-eight billion, eight hundred sixty-one million, seven hundred eighty-six thousand, nine hundred seventy-eight".