1265173260288 has 288 divisors, whose sum is σ = 4029785323200. Its totient is φ = 345755418624.

The previous prime is 1265173260287. The next prime is 1265173260293. The reversal of 1265173260288 is 8820623715621.

It is a self number, because there is not a number n which added to its sum of digits gives 1265173260288.

It is not an unprimeable number, because it can be changed into a prime (1265173260283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22723428 + ... + 22779036.

It is an arithmetic number, because the mean of its divisors is an integer number (13992310150).

Almost surely, 2^{1265173260288} 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 1265173260288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2014892661600).

1265173260288 is an abundant number, since it is smaller than the sum of its proper divisors (2764612062912).

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

1265173260288 is an equidigital number, since it uses as much as digits as its factorization.

1265173260288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55687 (or 55644 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 1265173260288 in words is "one trillion, two hundred sixty-five billion, one hundred seventy-three million, two hundred sixty thousand, two hundred eighty-eight".