65161972 has 12 divisors (see below), whose sum is σ = 115407936. Its totient is φ = 32188280.

The previous prime is 65161913. The next prime is 65162029. The reversal of 65161972 is 27916156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97804 + ... + 98467.

It is an arithmetic number, because the mean of its divisors is an integer number (9617328).

Almost surely, 2^65161972 is an apocalyptic number.

It is an amenable number.

65161972 is a deficient number, since it is larger than the sum of its proper divisors (50245964).

65161972 is a wasteful number, since it uses less digits than its factorization.

65161972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196358 (or 196356 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 65161972 is about 8072.2965753248. The cubic root of 65161972 is about 402.4062706278.

The spelling of 65161972 in words is "sixty-five million, one hundred sixty-one thousand, nine hundred seventy-two".