15384556722138 has 64 divisors (see below), whose sum is σ = 31367685888000. Its totient is φ = 5029443904320.

The previous prime is 15384556722137. The next prime is 15384556722163. The reversal of 15384556722138 is 83122765548351.

It is not an unprimeable number, because it can be changed into a prime (15384556722133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43328968 + ... + 43682588.

It is an arithmetic number, because the mean of its divisors is an integer number (490120092000).

Almost surely, 2^{15384556722138} is an apocalyptic number.

15384556722138 is an abundant number, since it is smaller than the sum of its proper divisors (15983129165862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15384556722138 is a wasteful number, since it uses less digits than its factorization.

15384556722138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354347.

The product of its digits is 48384000, while the sum is 60.

The spelling of 15384556722138 in words is "fifteen trillion, three hundred eighty-four billion, five hundred fifty-six million, seven hundred twenty-two thousand, one hundred thirty-eight".