61001105605 has 8 divisors (see below), whose sum is σ = 79855992864. Its totient is φ = 44364440400.

The previous prime is 61001105603. The next prime is 61001105611. The reversal of 61001105605 is 50650110016.

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

It is not a de Polignac number, because 61001105605 - 2¹ = 61001105603 is a prime.

It is a super-2 number, since 2×61001105605² (a number of 22 digits) contains 22 as substring.

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 61001105605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001105603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554555451 + ... + 554555560.

It is an arithmetic number, because the mean of its divisors is an integer number (9981999108).

Almost surely, 2^61001105605 is an apocalyptic number.

It is an amenable number.

61001105605 is a deficient number, since it is larger than the sum of its proper divisors (18854887259).

61001105605 is a wasteful number, since it uses less digits than its factorization.

61001105605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109111027.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 61001105605 in words is "sixty-one billion, one million, one hundred five thousand, six hundred five".