202638189652 has 24 divisors (see below), whose sum is σ = 355993545600. Its totient is φ = 100926400416.

The previous prime is 202638189571. The next prime is 202638189659. The reversal of 202638189652 is 256981836202.

202638189652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×202638189652² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202638189652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202638189659) 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 7 ways as a sum of consecutive naturals, for example, 1170849 + ... + 1332727.

It is an arithmetic number, because the mean of its divisors is an integer number (14833064400).

Almost surely, 2^202638189652 is an apocalyptic number.

It is an amenable number.

202638189652 is a deficient number, since it is larger than the sum of its proper divisors (153355355948).

202638189652 is a wasteful number, since it uses less digits than its factorization.

202638189652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163095 (or 163093 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 202638189652 in words is "two hundred two billion, six hundred thirty-eight million, one hundred eighty-nine thousand, six hundred fifty-two".