65556532172 has 6 divisors (see below), whose sum is σ = 114723931308. Its totient is φ = 32778266084.

The previous prime is 65556532163. The next prime is 65556532211. The reversal of 65556532172 is 27123565556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194566518 + ... + 8194566525.

It is an arithmetic number, because the mean of its divisors is an integer number (19120655218).

Almost surely, 2^65556532172 is an apocalyptic number.

It is an amenable number.

65556532172 is a deficient number, since it is larger than the sum of its proper divisors (49167399136).

65556532172 is a wasteful number, since it uses less digits than its factorization.

65556532172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389133047 (or 16389133045 counting only the distinct ones).

The product of its digits is 1890000, while the sum is 47.

The spelling of 65556532172 in words is "sixty-five billion, five hundred fifty-six million, five hundred thirty-two thousand, one hundred seventy-two".