612208746578 has 162 divisors, whose sum is σ = 1129484566413. Its totient is φ = 248571797760.

The previous prime is 612208746521. The next prime is 612208746607. The reversal of 612208746578 is 875647802216.

It can be written as a sum of positive squares in 14 ways, for example, as 5388000409 + 606820746169 = 73403^2 + 778987^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=553267.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 8386421150 + ... + 8386421222.

Almost surely, 2^612208746578 is an apocalyptic number.

612208746578 is a deficient number, since it is larger than the sum of its proper divisors (517275819835).

612208746578 is a wasteful number, since it uses less digits than its factorization.

612208746578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 612208746578 in words is "six hundred twelve billion, two hundred eight million, seven hundred forty-six thousand, five hundred seventy-eight".