128546344815 has 64 divisors (see below), whose sum is σ = 249113677824. Its totient is φ = 55256076288.

The previous prime is 128546344807. The next prime is 128546344837. The reversal of 128546344815 is 518443645821.

It is not a de Polignac number, because 128546344815 - 2³ = 128546344807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1925322 + ... + 1990968.

It is an arithmetic number, because the mean of its divisors is an integer number (3892401216).

Almost surely, 2^128546344815 is an apocalyptic number.

128546344815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128546344815 is a deficient number, since it is larger than the sum of its proper divisors (120567333009).

128546344815 is a wasteful number, since it uses less digits than its factorization.

128546344815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66776.

The product of its digits is 3686400, while the sum is 51.

The spelling of 128546344815 in words is "one hundred twenty-eight billion, five hundred forty-six million, three hundred forty-four thousand, eight hundred fifteen".