861318604608 has 112 divisors (see below), whose sum is σ = 2841232848384. Its totient is φ = 223719114240.

The previous prime is 861318604567. The next prime is 861318604633. The reversal of 861318604608 is 806406813168.

It is a tau number, because it is divible by the number of its divisors (112).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29115310 + ... + 29144877.

It is an arithmetic number, because the mean of its divisors is an integer number (25368150432).

Almost surely, 2^861318604608 is an apocalyptic number.

861318604608 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

861318604608 is an abundant number, since it is smaller than the sum of its proper divisors (1979914243776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861318604608 is a wasteful number, since it uses less digits than its factorization.

861318604608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58260220 (or 58260210 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 861318604608 in words is "eight hundred sixty-one billion, three hundred eighteen million, six hundred four thousand, six hundred eight".