561191036 has 24 divisors (see below), whose sum is σ = 1136593920. Its totient is φ = 237465072.

The previous prime is 561191023. The next prime is 561191039. The reversal of 561191036 is 630191165.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 561190993 and 561191011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561191039) 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, 124640 + ... + 129063.

It is an arithmetic number, because the mean of its divisors is an integer number (47358080).

Almost surely, 2^561191036 is an apocalyptic number.

It is an amenable number.

561191036 is an abundant number, since it is smaller than the sum of its proper divisors (575402884).

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

561191036 is a wasteful number, since it uses less digits than its factorization.

561191036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253793 (or 253791 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 561191036 is about 23689.4709945157. The cubic root of 561191036 is about 824.8410032133.

The spelling of 561191036 in words is "five hundred sixty-one million, one hundred ninety-one thousand, thirty-six".