61055055099 has 16 divisors (see below), whose sum is σ = 94384627200. Its totient is φ = 38933657928.

The previous prime is 61055055097. The next prime is 61055055163. The reversal of 61055055099 is 99055055016.

61055055099 is a `hidden beast` number, since 6 + 1 + 0 + 5 + 5 + 0 + 550 + 99 = 666.

It is not a de Polignac number, because 61055055099 - 2¹ = 61055055097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61055055097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49158039 + ... + 49159280.

It is an arithmetic number, because the mean of its divisors is an integer number (5899039200).

Almost surely, 2^61055055099 is an apocalyptic number.

61055055099 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

61055055099 is a deficient number, since it is larger than the sum of its proper divisors (33329572101).

61055055099 is a wasteful number, since it uses less digits than its factorization.

61055055099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98317351 (or 98317345 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 45.

The spelling of 61055055099 in words is "sixty-one billion, fifty-five million, fifty-five thousand, ninety-nine".