618626801858 has 32 divisors (see below), whose sum is σ = 1061923839984. Its totient is φ = 267754586112.

The previous prime is 618626801843. The next prime is 618626801867. The reversal of 618626801858 is 858108626816.

It can be written as a sum of positive squares in 8 ways, for example, as 297152543689 + 321474258169 = 545117^2 + 566987^2 .

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 618626801797 and 618626801806.

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 15 ways as a sum of consecutive naturals, for example, 2403935 + ... + 2648802.

Almost surely, 2^618626801858 is an apocalyptic number.

618626801858 is a deficient number, since it is larger than the sum of its proper divisors (443297038126).

618626801858 is a wasteful number, since it uses less digits than its factorization.

618626801858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5053046.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 618626801858 in words is "six hundred eighteen billion, six hundred twenty-six million, eight hundred one thousand, eight hundred fifty-eight".