61556660059605 has 8 divisors (see below), whose sum is σ = 98490656095392. Its totient is φ = 32830218698448.

The previous prime is 61556660059589. The next prime is 61556660059627. The reversal of 61556660059605 is 50695006665516.

It is a happy number.

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

It is not a de Polignac number, because 61556660059605 - 2⁴ = 61556660059589 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051888668639 + ... + 2051888668668.

It is an arithmetic number, because the mean of its divisors is an integer number (12311332011924).

Almost surely, 2^{61556660059605} is an apocalyptic number.

It is an amenable number.

61556660059605 is a deficient number, since it is larger than the sum of its proper divisors (36933996035787).

61556660059605 is a wasteful number, since it uses less digits than its factorization.

61556660059605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103777337315.

The product of its (nonzero) digits is 43740000, while the sum is 60.

The spelling of 61556660059605 in words is "sixty-one trillion, five hundred fifty-six billion, six hundred sixty million, fifty-nine thousand, six hundred five".