102642657205 has 16 divisors (see below), whose sum is σ = 142272604224. Its totient is φ = 70258074880.

The previous prime is 102642657203. The next prime is 102642657269. The reversal of 102642657205 is 502756246201.

It is not a de Polignac number, because 102642657205 - 2¹ = 102642657203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102642657203) 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, 54888187 + ... + 54890056.

It is an arithmetic number, because the mean of its divisors is an integer number (8892037764).

Almost surely, 2^102642657205 is an apocalyptic number.

It is an amenable number.

102642657205 is a deficient number, since it is larger than the sum of its proper divisors (39629947019).

102642657205 is a wasteful number, since it uses less digits than its factorization.

102642657205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109778276.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 102642657205 in words is "one hundred two billion, six hundred forty-two million, six hundred fifty-seven thousand, two hundred five".