61161105556659 has 4 divisors (see below), whose sum is σ = 81548140742216. Its totient is φ = 40774070371104.

The previous prime is 61161105556643. The next prime is 61161105556679. The reversal of 61161105556659 is 95665550116116.

It is a happy number.

61161105556659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 61161105556659 - 2⁴ = 61161105556643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61161105556599 and 61161105556608.

It is not an unprimeable number, because it can be changed into a prime (61161105556679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10193517592774 + ... + 10193517592779.

It is an arithmetic number, because the mean of its divisors is an integer number (20387035185554).

Almost surely, 2^{61161105556659} is an apocalyptic number.

61161105556659 is a deficient number, since it is larger than the sum of its proper divisors (20387035185557).

61161105556659 is a wasteful number, since it uses less digits than its factorization.

61161105556659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20387035185556.

The product of its (nonzero) digits is 7290000, while the sum is 57.

The spelling of 61161105556659 in words is "sixty-one trillion, one hundred sixty-one billion, one hundred five million, five hundred fifty-six thousand, six hundred fifty-nine".