203426540655 has 32 divisors (see below), whose sum is σ = 350930790336. Its totient is φ = 100030961664.

The previous prime is 203426540641. The next prime is 203426540689. The reversal of 203426540655 is 556045624302.

It is not a de Polignac number, because 203426540655 - 2⁶ = 203426540591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445162 + ... + 777831.

It is an arithmetic number, because the mean of its divisors is an integer number (10966587198).

Almost surely, 2^203426540655 is an apocalyptic number.

203426540655 is a deficient number, since it is larger than the sum of its proper divisors (147504249681).

203426540655 is a wasteful number, since it uses less digits than its factorization.

203426540655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223867.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 203426540655 in words is "two hundred three billion, four hundred twenty-six million, five hundred forty thousand, six hundred fifty-five".