617643128 has 16 divisors (see below), whose sum is σ = 1166536080. Its totient is φ = 306566848.

The previous prime is 617643119. The next prime is 617643151. The reversal of 617643128 is 821346716.

It is a junction number, because it is equal to n+sod(n) for n = 617643091 and 617643100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280676 + ... + 282867.

It is an arithmetic number, because the mean of its divisors is an integer number (72908505).

Almost surely, 2^617643128 is an apocalyptic number.

It is an amenable number.

617643128 is a deficient number, since it is larger than the sum of its proper divisors (548892952).

617643128 is a wasteful number, since it uses less digits than its factorization.

617643128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563686 (or 563682 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 617643128 is about 24852.4270042183. The cubic root of 617643128 is about 851.6200374711.

The spelling of 617643128 in words is "six hundred seventeen million, six hundred forty-three thousand, one hundred twenty-eight".