65428439916 has 144 divisors (see below), whose sum is σ = 185105356800. Its totient is φ = 17914659840.

The previous prime is 65428439827. The next prime is 65428440001. The reversal of 65428439916 is 61993482456.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1860060 + ... + 1894908.

Almost surely, 2^65428439916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65428439916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92552678400).

65428439916 is an abundant number, since it is smaller than the sum of its proper divisors (119676916884).

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

65428439916 is a wasteful number, since it uses less digits than its factorization.

65428439916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35004 (or 34995 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The spelling of 65428439916 in words is "sixty-five billion, four hundred twenty-eight million, four hundred thirty-nine thousand, nine hundred sixteen".