203642055645 has 16 divisors (see below), whose sum is σ = 372374044800. Its totient is φ = 93093511104.

The previous prime is 203642055641. The next prime is 203642055647. The reversal of 203642055645 is 546550246302.

It is not a de Polignac number, because 203642055645 - 2² = 203642055641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203642055597 and 203642055606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203642055641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969723970 + ... + 969724179.

It is an arithmetic number, because the mean of its divisors is an integer number (23273377800).

Almost surely, 2^203642055645 is an apocalyptic number.

It is an amenable number.

203642055645 is a deficient number, since it is larger than the sum of its proper divisors (168731989155).

203642055645 is a wasteful number, since it uses less digits than its factorization.

203642055645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939448164.

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

The spelling of 203642055645 in words is "two hundred three billion, six hundred forty-two million, fifty-five thousand, six hundred forty-five".