9945505550055 has 32 divisors (see below), whose sum is σ = 16957961017344. Its totient is φ = 4965699216896.

The previous prime is 9945505550053. The next prime is 9945505550069. The reversal of 9945505550055 is 5500555055499.

It is not a de Polignac number, because 9945505550055 - 2¹ = 9945505550053 is a prime.

It is a super-2 number, since 2×9945505550055² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9945505549977 and 9945505550004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945505550053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306659874 + ... + 306692303.

It is an arithmetic number, because the mean of its divisors is an integer number (529936281792).

Almost surely, 2^{9945505550055} is an apocalyptic number.

9945505550055 is a deficient number, since it is larger than the sum of its proper divisors (7012455467289).

9945505550055 is a wasteful number, since it uses less digits than its factorization.

9945505550055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613352255.

The product of its (nonzero) digits is 25312500, while the sum is 57.

The spelling of 9945505550055 in words is "nine trillion, nine hundred forty-five billion, five hundred five million, five hundred fifty thousand, fifty-five".