561173955 has 16 divisors (see below), whose sum is σ = 903390720. Its totient is φ = 297455328.

The previous prime is 561173909. The next prime is 561173959. The reversal of 561173955 is 559371165.

561173955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561173955 - 2⁶ = 561173891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561173959) 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, 112315 + ... + 117204.

It is an arithmetic number, because the mean of its divisors is an integer number (56461920).

Almost surely, 2^561173955 is an apocalyptic number.

561173955 is a deficient number, since it is larger than the sum of its proper divisors (342216765).

561173955 is a wasteful number, since it uses less digits than its factorization.

561173955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229690.

The product of its digits is 141750, while the sum is 42.

The square root of 561173955 is about 23689.1104729578. The cubic root of 561173955 is about 824.8326345525.

The spelling of 561173955 in words is "five hundred sixty-one million, one hundred seventy-three thousand, nine hundred fifty-five".