616442067557 has 4 divisors (see below), whose sum is σ = 616445080716. Its totient is φ = 616439054400.

The previous prime is 616442067509. The next prime is 616442067589. The reversal of 616442067557 is 755760244616.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 404192049121 + 212250018436 = 635761^2 + 460706^2 .

It is a cyclic number.

It is not a de Polignac number, because 616442067557 - 2¹⁰ = 616442066533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616442067499 and 616442067508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616442067257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175444 + ... + 1616957.

It is an arithmetic number, because the mean of its divisors is an integer number (154111270179).

Almost surely, 2^616442067557 is an apocalyptic number.

It is an amenable number.

616442067557 is a deficient number, since it is larger than the sum of its proper divisors (3013159).

616442067557 is a wasteful number, since it uses less digits than its factorization.

616442067557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013158.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 616442067557 in words is "six hundred sixteen billion, four hundred forty-two million, sixty-seven thousand, five hundred fifty-seven".