612561169 has 6 divisors (see below), whose sum is σ = 673311170. Its totient is φ = 556873680.

The previous prime is 612561167. The next prime is 612561179. The reversal of 612561169 is 961165216.

It can be written as a sum of positive squares in only one way, i.e., 372683025 + 239878144 = 19305^2 + 15488^2 .

It is not a de Polignac number, because 612561169 - 2¹ = 612561167 is a prime.

It is a super-2 number, since 2×612561169² = 750462371533293122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612561161) 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, 2531124 + ... + 2531365.

Almost surely, 2^612561169 is an apocalyptic number.

It is an amenable number.

612561169 is a deficient number, since it is larger than the sum of its proper divisors (60750001).

612561169 is a wasteful number, since it uses less digits than its factorization.

612561169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062511 (or 5062500 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 612561169 is about 24749.9731110965. The cubic root of 612561169 is about 849.2778960644.

The spelling of 612561169 in words is "six hundred twelve million, five hundred sixty-one thousand, one hundred sixty-nine".