616777442 has 18 divisors (see below), whose sum is σ = 983741283. Its totient is φ = 289967232.

The previous prime is 616777397. The next prime is 616777451. The reversal of 616777442 is 244777616.

It can be written as a sum of positive squares in 5 ways, for example, as 609546721 + 7230721 = 24689^2 + 2689^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17561.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616777393 and 616777402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 596558 + ... + 597590.

Almost surely, 2^616777442 is an apocalyptic number.

616777442 is a deficient number, since it is larger than the sum of its proper divisors (366963841).

616777442 is an equidigital number, since it uses as much as digits as its factorization.

616777442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102 (or 1052 counting only the distinct ones).

The product of its digits is 395136, while the sum is 44.

The square root of 616777442 is about 24835.0043688339. The cubic root of 616777442 is about 851.2219757565.

The spelling of 616777442 in words is "six hundred sixteen million, seven hundred seventy-seven thousand, four hundred forty-two".