203940655523 has 8 divisors (see below), whose sum is σ = 224319400176. Its totient is φ = 185400594720.

The previous prime is 203940655487. The next prime is 203940655531. The reversal of 203940655523 is 325556049302.

It is not a de Polignac number, because 203940655523 - 2¹⁶ = 203940589987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203940655573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76610486 + ... + 76613147.

It is an arithmetic number, because the mean of its divisors is an integer number (28039925022).

Almost surely, 2^203940655523 is an apocalyptic number.

203940655523 is a deficient number, since it is larger than the sum of its proper divisors (20378744653).

203940655523 is an equidigital number, since it uses as much as digits as its factorization.

203940655523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153223666 (or 153223644 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 44.

The spelling of 203940655523 in words is "two hundred three billion, nine hundred forty million, six hundred fifty-five thousand, five hundred twenty-three".