265997160 has 192 divisors, whose sum is σ = 1015822080. Its totient is φ = 59512320.

The previous prime is 265997159. The next prime is 265997167. The reversal of 265997160 is 61799562.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (265997167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48897 + ... + 54063.

It is an arithmetic number, because the mean of its divisors is an integer number (5290740).

Almost surely, 2^265997160 is an apocalyptic number.

265997160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265997160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507911040).

265997160 is an abundant number, since it is smaller than the sum of its proper divisors (749824920).

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

265997160 is a wasteful number, since it uses less digits than its factorization.

265997160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208 (or 5201 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 265997160 is about 16309.4193642815. The cubic root of 265997160 is about 643.1204703220.

The spelling of 265997160 in words is "two hundred sixty-five million, nine hundred ninety-seven thousand, one hundred sixty".