612161073377578 has 16 divisors (see below), whose sum is σ = 941979598265160. Its totient is φ = 298189173184000.

The previous prime is 612161073377531. The next prime is 612161073377593. The reversal of 612161073377578 is 875773370161216.

It can be written as a sum of positive squares in 4 ways, for example, as 589561764877449 + 22599308500129 = 24280893^2 + 4753873^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5324749183 + ... + 5324864146.

Almost surely, 2^{612161073377578} is an apocalyptic number.

612161073377578 is a deficient number, since it is larger than the sum of its proper divisors (329818524887582).

612161073377578 is a wasteful number, since it uses less digits than its factorization.

612161073377578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10649614073.

The product of its (nonzero) digits is 62233920, while the sum is 64.

The spelling of 612161073377578 in words is "six hundred twelve trillion, one hundred sixty-one billion, seventy-three million, three hundred seventy-seven thousand, five hundred seventy-eight".