203426540656 has 40 divisors (see below), whose sum is σ = 396085898880. Its totient is φ = 101212041216.

The previous prime is 203426540641. The next prime is 203426540689. The reversal of 203426540656 is 656045624302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667796 + ... + 2742988.

It is an arithmetic number, because the mean of its divisors is an integer number (9902147472).

Almost surely, 2^203426540656 is an apocalyptic number.

It is an amenable number.

203426540656 is a deficient number, since it is larger than the sum of its proper divisors (192659358224).

203426540656 is a wasteful number, since it uses less digits than its factorization.

203426540656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76033 (or 76027 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 203426540656 in words is "two hundred three billion, four hundred twenty-six million, five hundred forty thousand, six hundred fifty-six".