4778420947172 has 6 divisors (see below), whose sum is σ = 8362236657558. Its totient is φ = 2389210473584.

The previous prime is 4778420947141. The next prime is 4778420947189. The reversal of 4778420947172 is 2717490248774.

It can be written as a sum of positive squares in only one way, i.e., 4343989682176 + 434431264996 = 2084224^2 + 659114^2 .

It is a super-2 number, since 2×4778420947172² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597302618393 + ... + 597302618400.

It is an arithmetic number, because the mean of its divisors is an integer number (1393706109593).

Almost surely, 2^{4778420947172} is an apocalyptic number.

It is an amenable number.

4778420947172 is a deficient number, since it is larger than the sum of its proper divisors (3583815710386).

4778420947172 is a wasteful number, since it uses less digits than its factorization.

4778420947172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194605236797 (or 1194605236795 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 62.

The spelling of 4778420947172 in words is "four trillion, seven hundred seventy-eight billion, four hundred twenty million, nine hundred forty-seven thousand, one hundred seventy-two".