15500055554985 has 16 divisors (see below), whose sum is σ = 25470361561536. Its totient is φ = 8043272071488.

The previous prime is 15500055554947. The next prime is 15500055555013. The reversal of 15500055554985 is 58945555000551.

15500055554985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15500055554985 - 2¹⁷ = 15500055423913 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13964013459 + ... + 13964014568.

It is an arithmetic number, because the mean of its divisors is an integer number (1591897597596).

Almost surely, 2^{15500055554985} is an apocalyptic number.

15500055554985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15500055554985 is a deficient number, since it is larger than the sum of its proper divisors (9970306006551).

15500055554985 is a wasteful number, since it uses less digits than its factorization.

15500055554985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27928028072.

The product of its (nonzero) digits is 22500000, while the sum is 57.

The spelling of 15500055554985 in words is "fifteen trillion, five hundred billion, fifty-five million, five hundred fifty-four thousand, nine hundred eighty-five".