65161950 has 96 divisors (see below), whose sum is σ = 186178560. Its totient is φ = 14774400.

The previous prime is 65161913. The next prime is 65162029. The reversal of 65161950 is 5916156.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240315 + ... + 240585.

It is an arithmetic number, because the mean of its divisors is an integer number (1939360).

Almost surely, 2^65161950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65161950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93089280).

65161950 is an abundant number, since it is smaller than the sum of its proper divisors (121016610).

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

65161950 is a wasteful number, since it uses less digits than its factorization.

65161950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 65161950 is about 8072.2952126393. The cubic root of 65161950 is about 402.4062253410.

The spelling of 65161950 in words is "sixty-five million, one hundred sixty-one thousand, nine hundred fifty".