102105665618 has 64 divisors (see below), whose sum is σ = 177504307200. Its totient is φ = 43591426560.

The previous prime is 102105665617. The next prime is 102105665621. The reversal of 102105665618 is 816566501201.

102105665618 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (102105665617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39376130 + ... + 39378722.

It is an arithmetic number, because the mean of its divisors is an integer number (2773504800).

Almost surely, 2^102105665618 is an apocalyptic number.

102105665618 is a deficient number, since it is larger than the sum of its proper divisors (75398641582).

102105665618 is a wasteful number, since it uses less digits than its factorization.

102105665618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 102105665618 in words is "one hundred two billion, one hundred five million, six hundred sixty-five thousand, six hundred eighteen".