61560560671 has 4 divisors (see below), whose sum is σ = 64800590200. Its totient is φ = 58320531144.

The previous prime is 61560560657. The next prime is 61560560681. The reversal of 61560560671 is 17606506516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61560560671 - 2⁵ = 61560560639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61560560681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620014736 + ... + 1620014773.

It is an arithmetic number, because the mean of its divisors is an integer number (16200147550).

Almost surely, 2^61560560671 is an apocalyptic number.

61560560671 is a deficient number, since it is larger than the sum of its proper divisors (3240029529).

61560560671 is a wasteful number, since it uses less digits than its factorization.

61560560671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240029528.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 61560560671 in words is "sixty-one billion, five hundred sixty million, five hundred sixty thousand, six hundred seventy-one".