612044654161 has 4 divisors (see below), whose sum is σ = 618104502324. Its totient is φ = 605984806000.

The previous prime is 612044654153. The next prime is 612044654201. The reversal of 612044654161 is 161456440216.

It is a happy number.

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 478275980625 + 133768673536 = 691575^2 + 365744^2 .

It is a cyclic number.

It is not a de Polignac number, because 612044654161 - 2³ = 612044654153 is a prime.

It is a super-2 number, since 2×612044654161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612044654131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3029923930 + ... + 3029924131.

It is an arithmetic number, because the mean of its divisors is an integer number (154526125581).

Almost surely, 2^612044654161 is an apocalyptic number.

It is an amenable number.

612044654161 is a deficient number, since it is larger than the sum of its proper divisors (6059848163).

612044654161 is a wasteful number, since it uses less digits than its factorization.

612044654161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6059848162.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 612044654161 in words is "six hundred twelve billion, forty-four million, six hundred fifty-four thousand, one hundred sixty-one".