203400554540451 has 16 divisors (see below), whose sum is σ = 271830479585280. Its totient is φ = 135285526802880.

The previous prime is 203400554540441. The next prime is 203400554540459. The reversal of 203400554540451 is 154045455004302.

It is not a de Polignac number, because 203400554540451 - 2⁹ = 203400554539939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203400554540459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26615791 + ... + 33394631.

It is an arithmetic number, because the mean of its divisors is an integer number (16989404974080).

Almost surely, 2^{203400554540451} is an apocalyptic number.

203400554540451 is a deficient number, since it is larger than the sum of its proper divisors (68429925044829).

203400554540451 is a wasteful number, since it uses less digits than its factorization.

203400554540451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802066.

The product of its (nonzero) digits is 960000, while the sum is 42.

The spelling of 203400554540451 in words is "two hundred three trillion, four hundred billion, five hundred fifty-four million, five hundred forty thousand, four hundred fifty-one".