612730161 has 6 divisors (see below), whose sum is σ = 885054690. Its totient is φ = 408486768.

The previous prime is 612730141. The next prime is 612730229. The reversal of 612730161 is 161037216.

612730161 is a `hidden beast` number, since 612 + 7 + 30 + 16 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 373842225 + 238887936 = 19335^2 + 15456^2 .

It is not a de Polignac number, because 612730161 - 2¹³ = 612721969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612730121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34040556 + ... + 34040573.

It is an arithmetic number, because the mean of its divisors is an integer number (147509115).

Almost surely, 2^612730161 is an apocalyptic number.

It is an amenable number.

612730161 is a deficient number, since it is larger than the sum of its proper divisors (272324529).

612730161 is a wasteful number, since it uses less digits than its factorization.

612730161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68081135 (or 68081132 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 612730161 is about 24753.3868591755. The cubic root of 612730161 is about 849.3559878433.

Adding to 612730161 its reverse (161037216), we get a palindrome (773767377).

The spelling of 612730161 in words is "six hundred twelve million, seven hundred thirty thousand, one hundred sixty-one".