861318604658 has 32 divisors (see below), whose sum is σ = 1415250662400. Its totient is φ = 391377530880.

The previous prime is 861318604651. The next prime is 861318604669. The reversal of 861318604658 is 856406813168.

861318604658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×861318604658³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (861318604651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436766 + ... + 1383257.

It is an arithmetic number, because the mean of its divisors is an integer number (44226583200).

Almost surely, 2^861318604658 is an apocalyptic number.

861318604658 is a deficient number, since it is larger than the sum of its proper divisors (553932057742).

861318604658 is a wasteful number, since it uses less digits than its factorization.

861318604658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820522.

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 861318604658 in words is "eight hundred sixty-one billion, three hundred eighteen million, six hundred four thousand, six hundred fifty-eight".