65161028 has 12 divisors (see below), whose sum is σ = 117964140. Its totient is φ = 31456992.

The previous prime is 65161027. The next prime is 65161049. The reversal of 65161028 is 82016156.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34668544 + 30492484 = 5888^2 + 5522^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (65161027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280751 + ... + 280982.

It is an arithmetic number, because the mean of its divisors is an integer number (9830345).

Almost surely, 2^65161028 is an apocalyptic number.

It is an amenable number.

65161028 is a deficient number, since it is larger than the sum of its proper divisors (52803112).

65161028 is a wasteful number, since it uses less digits than its factorization.

65161028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561766 (or 561764 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 65161028 is about 8072.2381035249. The cubic root of 65161028 is about 402.4043274016.

The spelling of 65161028 in words is "sixty-five million, one hundred sixty-one thousand, twenty-eight".