561172512 has 24 divisors (see below), whose sum is σ = 1473078096. Its totient is φ = 187057472.

The previous prime is 561172511. The next prime is 561172537. The reversal of 561172512 is 215271165.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 561172512.

It is not an unprimeable number, because it can be changed into a prime (561172511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2922678 + ... + 2922869.

It is an arithmetic number, because the mean of its divisors is an integer number (61378254).

Almost surely, 2^561172512 is an apocalyptic number.

It is an amenable number.

561172512 is an abundant number, since it is smaller than the sum of its proper divisors (911905584).

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

561172512 is a wasteful number, since it uses less digits than its factorization.

561172512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845560 (or 5845552 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 561172512 is about 23689.0800159061. The cubic root of 561172512 is about 824.8319275617.

The spelling of 561172512 in words is "five hundred sixty-one million, one hundred seventy-two thousand, five hundred twelve".