61555051055 has 8 divisors (see below), whose sum is σ = 74274162144. Its totient is φ = 48971973600.

The previous prime is 61555051049. The next prime is 61555051081. The reversal of 61555051055 is 55015055516.

It is a happy number.

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

It is not a de Polignac number, because 61555051055 - 2³² = 57260083759 is a prime.

It is a super-2 number, since 2×61555051055² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 34007411 + ... + 34009220.

It is an arithmetic number, because the mean of its divisors is an integer number (9284270268).

Almost surely, 2^61555051055 is an apocalyptic number.

61555051055 is a deficient number, since it is larger than the sum of its proper divisors (12719111089).

61555051055 is a wasteful number, since it uses less digits than its factorization.

61555051055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68016817.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 61555051055 in words is "sixty-one billion, five hundred fifty-five million, fifty-one thousand, fifty-five".