154557849638 has 32 divisors (see below), whose sum is σ = 264979719360.
Its totient is φ = 67171793920.
The previous prime is 154557849637. The next prime is 154557849709. The reversal of 154557849638 is 836948755451.
154557849638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (154557849637) by changing a digit.
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 15 ways as a sum of consecutive naturals, for example, 3384983 + ... + 3430338.
It is an arithmetic number, because the mean of its divisors is an integer number (8280616230).
Almost surely, 2154557849638 is an apocalyptic number.
154557849638 is a deficient number, since it is larger than the sum of its proper divisors (110421869722).
154557849638 is a wasteful number, since it uses less digits than its factorization.
154557849638 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6815392.
The product of its digits is 145152000, while the sum is 65.
The spelling of 154557849638 in words is "one hundred fifty-four billion, five hundred fifty-seven million, eight hundred forty-nine thousand, six hundred thirty-eight".