561961941 has 8 divisors (see below), whose sum is σ = 749852544. Its totient is φ = 374356320.

The previous prime is 561961909. The next prime is 561961943. The reversal of 561961941 is 149169165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561961941 - 2⁵ = 561961909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561961893 and 561961902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561961943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66600 + ... + 74561.

It is an arithmetic number, because the mean of its divisors is an integer number (93731568).

Almost surely, 2^561961941 is an apocalyptic number.

It is an amenable number.

561961941 is a deficient number, since it is larger than the sum of its proper divisors (187890603).

561961941 is a wasteful number, since it uses less digits than its factorization.

561961941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142491.

The product of its digits is 58320, while the sum is 42.

The square root of 561961941 is about 23705.7364576594. The cubic root of 561961941 is about 825.2185235639.

The spelling of 561961941 in words is "five hundred sixty-one million, nine hundred sixty-one thousand, nine hundred forty-one".