203155642650 has 24 divisors (see below), whose sum is σ = 503825994144. Its totient is φ = 54174838000.

The previous prime is 203155642601. The next prime is 203155642663. The reversal of 203155642650 is 56246551302.

It is a junction number, because it is equal to n+sod(n) for n = 203155642599 and 203155642608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 677185326 + ... + 677185625.

It is an arithmetic number, because the mean of its divisors is an integer number (20992749756).

Almost surely, 2^203155642650 is an apocalyptic number.

203155642650 is an abundant number, since it is smaller than the sum of its proper divisors (300670351494).

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

203155642650 is a wasteful number, since it uses less digits than its factorization.

203155642650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354370966 (or 1354370961 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 203155642650 in words is "two hundred three billion, one hundred fifty-five million, six hundred forty-two thousand, six hundred fifty".