616683545 has 4 divisors (see below), whose sum is σ = 740020260. Its totient is φ = 493346832.

The previous prime is 616683539. The next prime is 616683623. The reversal of 616683545 is 545386616.

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 232837081 + 383846464 = 15259^2 + 19592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616683545 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 616683496 and 616683505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61668350 + ... + 61668359.

It is an arithmetic number, because the mean of its divisors is an integer number (185005065).

Almost surely, 2^616683545 is an apocalyptic number.

It is an amenable number.

616683545 is a deficient number, since it is larger than the sum of its proper divisors (123336715).

616683545 is a wasteful number, since it uses less digits than its factorization.

616683545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123336714.

The product of its digits is 518400, while the sum is 44.

The square root of 616683545 is about 24833.1138804621. The cubic root of 616683545 is about 851.1787774374.

The spelling of 616683545 in words is "six hundred sixteen million, six hundred eighty-three thousand, five hundred forty-five".