561964134 has 16 divisors (see below), whose sum is σ = 1128109680. Its totient is φ = 186624480.

The previous prime is 561964133. The next prime is 561964153. The reversal of 561964134 is 431469165.

It is a junction number, because it is equal to n+sod(n) for n = 561964092 and 561964101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561964133) 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, 172477 + ... + 175704.

It is an arithmetic number, because the mean of its divisors is an integer number (70506855).

Almost surely, 2^561964134 is an apocalyptic number.

561964134 is an abundant number, since it is smaller than the sum of its proper divisors (566145546).

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

561964134 is a wasteful number, since it uses less digits than its factorization.

561964134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348455.

The product of its digits is 77760, while the sum is 39.

The square root of 561964134 is about 23705.7827122413. The cubic root of 561964134 is about 825.2195970066.

The spelling of 561964134 in words is "five hundred sixty-one million, nine hundred sixty-four thousand, one hundred thirty-four".