203400554540550 has 192 divisors, whose sum is σ = 511269936629760. Its totient is φ = 53507037588480.

The previous prime is 203400554540501. The next prime is 203400554540551. The reversal of 203400554540550 is 55045455004302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203400554540551) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39984380107 + ... + 39984385193.

It is an arithmetic number, because the mean of its divisors is an integer number (2662864253280).

Almost surely, 2^{203400554540550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203400554540550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255634968314880).

203400554540550 is an abundant number, since it is smaller than the sum of its proper divisors (307869382089210).

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

203400554540550 is a wasteful number, since it uses less digits than its factorization.

203400554540550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9327 (or 9322 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 42.

The spelling of 203400554540550 in words is "two hundred three trillion, four hundred billion, five hundred fifty-four million, five hundred forty thousand, five hundred fifty".