61110555005551 has 8 divisors (see below), whose sum is σ = 62008478597520. Its totient is φ = 60214274459712.

The previous prime is 61110555005537. The next prime is 61110555005573. The reversal of 61110555005551 is 15550055501116.

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 a de Polignac number, because none of the positive numbers 2^k-61110555005551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61110555005051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410686600 + ... + 410835373.

It is an arithmetic number, because the mean of its divisors is an integer number (7751059824690).

Almost surely, 2^{61110555005551} is an apocalyptic number.

61110555005551 is a deficient number, since it is larger than the sum of its proper divisors (897923591969).

61110555005551 is a wasteful number, since it uses less digits than its factorization.

61110555005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821523065.

The product of its (nonzero) digits is 93750, while the sum is 40.

The spelling of 61110555005551 in words is "sixty-one trillion, one hundred ten billion, five hundred fifty-five million, five thousand, five hundred fifty-one".