65161918 has 16 divisors (see below), whose sum is σ = 103654080. Its totient is φ = 30616576.

The previous prime is 65161913. The next prime is 65162029. The reversal of 65161918 is 81916156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30555 + ... + 32617.

It is an arithmetic number, because the mean of its divisors is an integer number (6478380).

Almost surely, 2^65161918 is an apocalyptic number.

65161918 is a deficient number, since it is larger than the sum of its proper divisors (38492162).

65161918 is a wasteful number, since it uses less digits than its factorization.

65161918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011.

The product of its digits is 12960, while the sum is 37.

The square root of 65161918 is about 8072.2932305510. The cubic root of 65161918 is about 402.4061594692.

The spelling of 65161918 in words is "sixty-five million, one hundred sixty-one thousand, nine hundred eighteen".