946778818178 has 18 divisors (see below), whose sum is σ = 1451126600931. Its totient is φ = 463285644484.

The previous prime is 946778818163. The next prime is 946778818187. The reversal of 946778818178 is 871818877649.

It can be written as a sum of positive squares in only one way, i.e., 473389409089 + 473389409089 = 688033^2 + 688033^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=688033.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 64667783 + ... + 64682421.

Almost surely, 2^946778818178 is an apocalyptic number.

946778818178 is a deficient number, since it is larger than the sum of its proper divisors (504347782753).

946778818178 is an frugal number, since it uses more digits than its factorization.

946778818178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29374 (or 14688 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 74.

The spelling of 946778818178 in words is "nine hundred forty-six billion, seven hundred seventy-eight million, eight hundred eighteen thousand, one hundred seventy-eight".