561651409143 has 36 divisors (see below), whose sum is σ = 893718025200. Its totient is φ = 339636380160.

The previous prime is 561651409091. The next prime is 561651409181. The reversal of 561651409143 is 341904156165.

561651409143 is a `hidden beast` number, since 5 + 6 + 1 + 6 + 514 + 0 + 91 + 43 = 666.

It is not a de Polignac number, because 561651409143 - 2⁸ = 561651408887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561651409243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85371 + ... + 1063292.

It is an arithmetic number, because the mean of its divisors is an integer number (24825500700).

Almost surely, 2^561651409143 is an apocalyptic number.

561651409143 is a deficient number, since it is larger than the sum of its proper divisors (332066616057).

561651409143 is a wasteful number, since it uses less digits than its factorization.

561651409143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149140 (or 1149126 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 561651409143 in words is "five hundred sixty-one billion, six hundred fifty-one million, four hundred nine thousand, one hundred forty-three".