616534745 has 4 divisors (see below), whose sum is σ = 739841700. Its totient is φ = 493227792.

The previous prime is 616534739. The next prime is 616534759. The reversal of 616534745 is 547435616.

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 73085401 + 543449344 = 8549^2 + 23312^2 .

It is a cyclic number.

It is not a de Polignac number, because 616534745 - 2⁴ = 616534729 is a prime.

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, 61653470 + ... + 61653479.

It is an arithmetic number, because the mean of its divisors is an integer number (184960425).

Almost surely, 2^616534745 is an apocalyptic number.

It is an amenable number.

616534745 is a deficient number, since it is larger than the sum of its proper divisors (123306955).

616534745 is a wasteful number, since it uses less digits than its factorization.

616534745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123306954.

The product of its digits is 302400, while the sum is 41.

The square root of 616534745 is about 24830.1177000835. The cubic root of 616534745 is about 851.1103114247.

The spelling of 616534745 in words is "six hundred sixteen million, five hundred thirty-four thousand, seven hundred forty-five".