61055055009 has 12 divisors (see below), whose sum is σ = 94974530196. Its totient is φ = 37572341472.

The previous prime is 61055054941. The next prime is 61055055011. The reversal of 61055055009 is 90055055016.

It can be written as a sum of positive squares in 2 ways, for example, as 40011200784 + 21043854225 = 200028^2 + 145065^2 .

It is not a de Polignac number, because 61055055009 - 2¹³ = 61055046817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61055055209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260918922 + ... + 260919155.

It is an arithmetic number, because the mean of its divisors is an integer number (7914544183).

Almost surely, 2^61055055009 is an apocalyptic number.

It is an amenable number.

61055055009 is a deficient number, since it is larger than the sum of its proper divisors (33919475187).

61055055009 is a wasteful number, since it uses less digits than its factorization.

61055055009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521838096 (or 521838093 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The spelling of 61055055009 in words is "sixty-one billion, fifty-five million, fifty-five thousand, nine".