61143635161 has 16 divisors (see below), whose sum is σ = 71345104000. Its totient is φ = 52379009424.

The previous prime is 61143635131. The next prime is 61143635173. The reversal of 61143635161 is 16153634116.

It is not a de Polignac number, because 61143635161 - 2¹⁵ = 61143602393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61143635161.

It is not an unprimeable number, because it can be changed into a prime (61143635131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563806 + ... + 663448.

It is an arithmetic number, because the mean of its divisors is an integer number (4459069000).

Almost surely, 2^61143635161 is an apocalyptic number.

It is an amenable number.

61143635161 is a deficient number, since it is larger than the sum of its proper divisors (10201468839).

61143635161 is an equidigital number, since it uses as much as digits as its factorization.

61143635161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101453 (or 101439 counting only the distinct ones).

The product of its digits is 38880, while the sum is 37.

The spelling of 61143635161 in words is "sixty-one billion, one hundred forty-three million, six hundred thirty-five thousand, one hundred sixty-one".