65163924 has 216 divisors, whose sum is σ = 211754088. Its totient is φ = 16773120.

The previous prime is 65163893. The next prime is 65163929. The reversal of 65163924 is 42936156.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8643600 + 56520324 = 2940^2 + 7518^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (38880) is a multiple of the sum of its prime factors (135).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65163929) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1229482 + ... + 1229534.

It is an arithmetic number, because the mean of its divisors is an integer number (980343).

Almost surely, 2^65163924 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 65163924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105877044).

65163924 is an abundant number, since it is smaller than the sum of its proper divisors (146590164).

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

65163924 is a wasteful number, since it uses less digits than its factorization.

65163924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 123 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 65163924 is about 8072.4174817709. The cubic root of 65163924 is about 402.4102887649.

It can be divided in two parts, 6516 and 3924, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 65163924 in words is "sixty-five million, one hundred sixty-three thousand, nine hundred twenty-four".