616623442 has 4 divisors (see below), whose sum is σ = 924935166. Its totient is φ = 308311720.

The previous prime is 616623421. The next prime is 616623457. The reversal of 616623442 is 244326616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 504496521 + 112126921 = 22461^2 + 10589^2 .

It is a junction number, because it is equal to n+sod(n) for n = 616623398 and 616623407.

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 as a sum of consecutive naturals, namely, 154155859 + ... + 154155862.

Almost surely, 2^616623442 is an apocalyptic number.

616623442 is a deficient number, since it is larger than the sum of its proper divisors (308311724).

616623442 is a wasteful number, since it uses less digits than its factorization.

616623442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308311723.

The product of its digits is 41472, while the sum is 34.

The square root of 616623442 is about 24831.9037127644. The cubic root of 616623442 is about 851.1511241077.

The spelling of 616623442 in words is "six hundred sixteen million, six hundred twenty-three thousand, four hundred forty-two".