616400436545 has 4 divisors (see below), whose sum is σ = 739680523860. Its totient is φ = 493120349232.

The previous prime is 616400436523. The next prime is 616400436551. The reversal of 616400436545 is 545634004616.

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 376700110081 + 239700326464 = 613759^2 + 489592^2 .

It is a cyclic number.

It is not a de Polignac number, because 616400436545 - 2¹⁶ = 616400371009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616400436496 and 616400436505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61640043650 + ... + 61640043659.

It is an arithmetic number, because the mean of its divisors is an integer number (184920130965).

Almost surely, 2^616400436545 is an apocalyptic number.

It is an amenable number.

616400436545 is a deficient number, since it is larger than the sum of its proper divisors (123280087315).

616400436545 is a wasteful number, since it uses less digits than its factorization.

616400436545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123280087314.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 616400436545 in words is "six hundred sixteen billion, four hundred million, four hundred thirty-six thousand, five hundred forty-five".