15538461555 has 64 divisors (see below), whose sum is σ = 26661519360. Its totient is φ = 7709302656.

The previous prime is 15538461529. The next prime is 15538461563. The reversal of 15538461555 is 55516483551.

It is not a de Polignac number, because 15538461555 - 2¹¹ = 15538459507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2640106 + ... + 2645984.

It is an arithmetic number, because the mean of its divisors is an integer number (416586240).

Almost surely, 2^15538461555 is an apocalyptic number.

15538461555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15538461555 is a deficient number, since it is larger than the sum of its proper divisors (11123057805).

15538461555 is a wasteful number, since it uses less digits than its factorization.

15538461555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120.

The product of its digits is 1800000, while the sum is 48.

The spelling of 15538461555 in words is "fifteen billion, five hundred thirty-eight million, four hundred sixty-one thousand, five hundred fifty-five".