861479912618 has 16 divisors (see below), whose sum is σ = 1399395826080. Its totient is φ = 395384848176.

The previous prime is 861479912603. The next prime is 861479912681. The reversal of 861479912618 is 816219974168.

It is a super-2 number, since 2×861479912618² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92547980 + ... + 92557287.

It is an arithmetic number, because the mean of its divisors is an integer number (87462239130).

Almost surely, 2^861479912618 is an apocalyptic number.

861479912618 is a deficient number, since it is larger than the sum of its proper divisors (537915913462).

861479912618 is a wasteful number, since it uses less digits than its factorization.

861479912618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185105461.

The product of its digits is 10450944, while the sum is 62.

The spelling of 861479912618 in words is "eight hundred sixty-one billion, four hundred seventy-nine million, nine hundred twelve thousand, six hundred eighteen".