65428439915 has 16 divisors (see below), whose sum is σ = 78997610016. Its totient is φ = 52021267200.

The previous prime is 65428439827. The next prime is 65428440001. The reversal of 65428439915 is 51993482456.

It is not a de Polignac number, because 65428439915 - 2¹² = 65428435819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578360 + ... + 682170.

It is an arithmetic number, because the mean of its divisors is an integer number (4937350626).

Almost surely, 2^65428439915 is an apocalyptic number.

65428439915 is a deficient number, since it is larger than the sum of its proper divisors (13569170101).

65428439915 is a wasteful number, since it uses less digits than its factorization.

65428439915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104590.

The product of its digits is 9331200, while the sum is 56.

The spelling of 65428439915 in words is "sixty-five billion, four hundred twenty-eight million, four hundred thirty-nine thousand, nine hundred fifteen".