58661112781 has 6 divisors (see below), whose sum is σ = 62314746410. Its totient is φ = 55210458816.

The previous prime is 58661112743. The next prime is 58661112833. The reversal of 58661112781 is 18721116685.

It can be written as a sum of positive squares in 3 ways, for example, as 29546515881 + 29114596900 = 171891^2 + 170630^2 .

It is not a de Polignac number, because 58661112781 - 2²⁵ = 58627558349 is a prime.

It is a super-2 number, since 2×58661112781² (a number of 22 digits) contains 22 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 (58661112721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101489526 + ... + 101490103.

Almost surely, 2^58661112781 is an apocalyptic number.

It is an amenable number.

58661112781 is a deficient number, since it is larger than the sum of its proper divisors (3653633629).

58661112781 is a wasteful number, since it uses less digits than its factorization.

58661112781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202979663 (or 202979646 counting only the distinct ones).

The product of its digits is 161280, while the sum is 46.

The spelling of 58661112781 in words is "fifty-eight billion, six hundred sixty-one million, one hundred twelve thousand, seven hundred eighty-one".