65641969164 has 24 divisors (see below), whose sum is σ = 153169047808. Its totient is φ = 21880020240.

The previous prime is 65641969147. The next prime is 65641969171. The reversal of 65641969164 is 46196914656.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549369 + ... + 658095.

Almost surely, 2^65641969164 is an apocalyptic number.

It is an amenable number.

65641969164 is an abundant number, since it is smaller than the sum of its proper divisors (87527078644).

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

65641969164 is a wasteful number, since it uses less digits than its factorization.

65641969164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159045 (or 159043 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 57.

The spelling of 65641969164 in words is "sixty-five billion, six hundred forty-one million, nine hundred sixty-nine thousand, one hundred sixty-four".