15554555055 has 24 divisors (see below), whose sum is σ = 29035170528. Its totient is φ = 7657626816.

The previous prime is 15554555053. The next prime is 15554555057. The reversal of 15554555055 is 55055545551.

15554555055 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 45 + 550 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (15554555053) and next prime (15554555057).

It is not a de Polignac number, because 15554555055 - 2¹ = 15554555053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 15554555055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15554555053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13293907 + ... + 13295076.

It is an arithmetic number, because the mean of its divisors is an integer number (1209798772).

Almost surely, 2^15554555055 is an apocalyptic number.

15554555055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15554555055 is a deficient number, since it is larger than the sum of its proper divisors (13480615473).

15554555055 is a wasteful number, since it uses less digits than its factorization.

15554555055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26589007 (or 26589004 counting only the distinct ones).

The product of its (nonzero) digits is 1562500, while the sum is 45.

The spelling of 15554555055 in words is "fifteen billion, five hundred fifty-four million, five hundred fifty-five thousand, fifty-five".