15428744908887 has 8 divisors (see below), whose sum is σ = 20572155281920. Its totient is φ = 10285582237560.

The previous prime is 15428744908789. The next prime is 15428744908903. The reversal of 15428744908887 is 78880944782451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15428744908887 - 2²⁰ = 15428743860311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15428744948887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61780039 + ... + 62029272.

It is an arithmetic number, because the mean of its divisors is an integer number (2571519410240).

Almost surely, 2^{15428744908887} is an apocalyptic number.

15428744908887 is a deficient number, since it is larger than the sum of its proper divisors (5143410373033).

15428744908887 is a wasteful number, since it uses less digits than its factorization.

15428744908887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123850853.

The product of its (nonzero) digits is 1156055040, while the sum is 75.

The spelling of 15428744908887 in words is "fifteen trillion, four hundred twenty-eight billion, seven hundred forty-four million, nine hundred eight thousand, eight hundred eighty-seven".