65513872 has 10 divisors (see below), whose sum is σ = 126933158. Its totient is φ = 32756928.

The previous prime is 65513849. The next prime is 65513891. The reversal of 65513872 is 27831556.

It can be written as a sum of positive squares in only one way, i.e., 46294416 + 19219456 = 6804^2 + 4384^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2047293 + ... + 2047324.

Almost surely, 2^65513872 is an apocalyptic number.

It is an amenable number.

65513872 is a deficient number, since it is larger than the sum of its proper divisors (61419286).

65513872 is a wasteful number, since it uses less digits than its factorization.

65513872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094625 (or 4094619 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 65513872 is about 8094.0639977702. The cubic root of 65513872 is about 403.1293540142.

The spelling of 65513872 in words is "sixty-five million, five hundred thirteen thousand, eight hundred seventy-two".