617845138 has 8 divisors (see below), whose sum is σ = 930924288. Its totient is φ = 307537044.

The previous prime is 617845121. The next prime is 617845169. The reversal of 617845138 is 831548716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×617845138² = 763465229100478088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 617845094 and 617845103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692206 + ... + 693097.

It is an arithmetic number, because the mean of its divisors is an integer number (116365536).

Almost surely, 2^617845138 is an apocalyptic number.

617845138 is a deficient number, since it is larger than the sum of its proper divisors (313079150).

617845138 is a wasteful number, since it uses less digits than its factorization.

617845138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385528.

The product of its digits is 161280, while the sum is 43.

The square root of 617845138 is about 24856.4908625494. The cubic root of 617845138 is about 851.7128726395.

The spelling of 617845138 in words is "six hundred seventeen million, eight hundred forty-five thousand, one hundred thirty-eight".