61105100047 has 4 divisors (see below), whose sum is σ = 61105597216. Its totient is φ = 61104602880.

The previous prime is 61105100039. The next prime is 61105100137. The reversal of 61105100047 is 74000150116.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61105100047 - 2³ = 61105100039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61105099994 and 61105100030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61105100647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84922 + ... + 359752.

It is an arithmetic number, because the mean of its divisors is an integer number (15276399304).

Almost surely, 2^61105100047 is an apocalyptic number.

61105100047 is a deficient number, since it is larger than the sum of its proper divisors (497169).

61105100047 is a wasteful number, since it uses less digits than its factorization.

61105100047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497168.

The product of its (nonzero) digits is 840, while the sum is 25.

The spelling of 61105100047 in words is "sixty-one billion, one hundred five million, one hundred thousand, forty-seven".