61605223131055 has 8 divisors (see below), whose sum is σ = 73926489291552. Its totient is φ = 49284030815328.

The previous prime is 61605223131047. The next prime is 61605223131077. The reversal of 61605223131055 is 55013132250616.

It is a happy number.

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 61605223131055 - 2³ = 61605223131047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61605223130999 and 61605223131017.

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, 16608939 + ... + 19976668.

It is an arithmetic number, because the mean of its divisors is an integer number (9240811161444).

Almost surely, 2^{61605223131055} is an apocalyptic number.

61605223131055 is a deficient number, since it is larger than the sum of its proper divisors (12321266160497).

61605223131055 is a wasteful number, since it uses less digits than its factorization.

61605223131055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36922385.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 61605223131055 in words is "sixty-one trillion, six hundred five billion, two hundred twenty-three million, one hundred thirty-one thousand, fifty-five".