65155944 has 64 divisors (see below), whose sum is σ = 186825600. Its totient is φ = 18549504.

The previous prime is 65155943. The next prime is 65155957. The reversal of 65155944 is 44955156.

65155944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65155944² = 8490594077062272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65155943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64854 + ... + 65850.

It is an arithmetic number, because the mean of its divisors is an integer number (2919150).

Almost surely, 2^65155944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65155944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93412800).

65155944 is an abundant number, since it is smaller than the sum of its proper divisors (121669656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65155944 is a wasteful number, since it uses less digits than its factorization.

65155944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402 (or 1398 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 65155944 is about 8071.9231909131. The cubic root of 65155944 is about 402.3938616530.

The spelling of 65155944 in words is "sixty-five million, one hundred fifty-five thousand, nine hundred forty-four".