61005560061 has 8 divisors (see below), whose sum is σ = 81886658400. Its totient is φ = 40397417552.

The previous prime is 61005560039. The next prime is 61005560081. The reversal of 61005560061 is 16006550016.

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

It is a cyclic number.

It is not a de Polignac number, because 61005560061 - 2¹⁰ = 61005559037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005560081) 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, 68238435 + ... + 68239328.

It is an arithmetic number, because the mean of its divisors is an integer number (10235832300).

Almost surely, 2^61005560061 is an apocalyptic number.

It is an amenable number.

61005560061 is a deficient number, since it is larger than the sum of its proper divisors (20881098339).

61005560061 is a wasteful number, since it uses less digits than its factorization.

61005560061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136477915.

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 61005560061 in words is "sixty-one billion, five million, five hundred sixty thousand, sixty-one".