102155510205 has 64 divisors (see below), whose sum is σ = 209138688000. Its totient is φ = 46343119680.

The previous prime is 102155510161. The next prime is 102155510227. The reversal of 102155510205 is 502015551201.

102155510205 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 555 + 102 + 0 + 5 = 666.

It is not a de Polignac number, because 102155510205 - 2⁶ = 102155510141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288805 + ... + 536394.

It is an arithmetic number, because the mean of its divisors is an integer number (3267792000).

Almost surely, 2^102155510205 is an apocalyptic number.

102155510205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102155510205 is an abundant number, since it is smaller than the sum of its proper divisors (106983177795).

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

102155510205 is a wasteful number, since it uses less digits than its factorization.

102155510205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825351 (or 825345 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The spelling of 102155510205 in words is "one hundred two billion, one hundred fifty-five million, five hundred ten thousand, two hundred five".