561261641471 has 8 divisors (see below), whose sum is σ = 579375519744. Its totient is φ = 543148304760.

The previous prime is 561261641431. The next prime is 561261641477. The reversal of 561261641471 is 174146162165.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561261641471 is a prime.

It is a super-3 number, since 3×561261641471³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561261641477) 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, 3660470 + ... + 3810716.

It is an arithmetic number, because the mean of its divisors is an integer number (72421939968).

Almost surely, 2^561261641471 is an apocalyptic number.

561261641471 is a deficient number, since it is larger than the sum of its proper divisors (18113878273).

561261641471 is a wasteful number, since it uses less digits than its factorization.

561261641471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270781.

The product of its digits is 241920, while the sum is 44.

The spelling of 561261641471 in words is "five hundred sixty-one billion, two hundred sixty-one million, six hundred forty-one thousand, four hundred seventy-one".