102805685380 has 48 divisors (see below), whose sum is σ = 219146223744. Its totient is φ = 40503939840.

The previous prime is 102805685377. The next prime is 102805685401. The reversal of 102805685380 is 83586508201.

It is a self number, because there is not a number n which added to its sum of digits gives 102805685380.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1037395 + ... + 1132165.

It is an arithmetic number, because the mean of its divisors is an integer number (4565546328).

Almost surely, 2^102805685380 is an apocalyptic number.

102805685380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102805685380 is an abundant number, since it is smaller than the sum of its proper divisors (116340538364).

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

102805685380 is a wasteful number, since it uses less digits than its factorization.

102805685380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95596 (or 95594 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 102805685380 in words is "one hundred two billion, eight hundred five million, six hundred eighty-five thousand, three hundred eighty".