61281011105 has 8 divisors (see below), whose sum is σ = 74423204352. Its totient is φ = 48434148208.

The previous prime is 61281011093. The next prime is 61281011117. The reversal of 61281011105 is 50111018216.

It is an interprime number because it is at equal distance from previous prime (61281011093) and next prime (61281011117).

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 61281011105 - 2⁴ = 61281011089 is a prime.

It is a super-2 number, since 2×61281011105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73832129 + ... + 73832958.

It is an arithmetic number, because the mean of its divisors is an integer number (9302900544).

Almost surely, 2^61281011105 is an apocalyptic number.

It is an amenable number.

61281011105 is a deficient number, since it is larger than the sum of its proper divisors (13142193247).

61281011105 is a wasteful number, since it uses less digits than its factorization.

61281011105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147665175.

The product of its (nonzero) digits is 480, while the sum is 26.

The spelling of 61281011105 in words is "sixty-one billion, two hundred eighty-one million, eleven thousand, one hundred five".