4778779625764 has 27 divisors (see below), whose sum is σ = 8397505779187. Its totient is φ = 2379532949504.

The previous prime is 4778779625749. The next prime is 4778779625777. The reversal of 4778779625764 is 4675269778774.

The square root of 4778779625764 is 2186042.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 192157736164 + 4586621889600 = 438358^2 + 2141640^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1123623462 + ... + 1123627714.

Almost surely, 2^{4778779625764} is an apocalyptic number.

4778779625764 is the 2186042-nd square number.

It is an amenable number.

4778779625764 is a deficient number, since it is larger than the sum of its proper divisors (3618726153423).

4778779625764 is an frugal number, since it uses more digits than its factorization.

4778779625764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9024 (or 4512 counting only the distinct ones).

The product of its digits is 6970199040, while the sum is 79.

The spelling of 4778779625764 in words is "four trillion, seven hundred seventy-eight billion, seven hundred seventy-nine million, six hundred twenty-five thousand, seven hundred sixty-four".