1265376768 has 160 divisors (see below), whose sum is σ = 3514275072. Its totient is φ = 404275200.

The previous prime is 1265376713. The next prime is 1265376773. The reversal of 1265376768 is 8676735621.

It is a self number, because there is not a number n which added to its sum of digits gives 1265376768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4471155 + ... + 4471437.

Almost surely, 2^1265376768 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 1265376768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1757137536).

1265376768 is an abundant number, since it is smaller than the sum of its proper divisors (2248898304).

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

1265376768 is an equidigital number, since it uses as much as digits as its factorization.

1265376768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 400 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 1265376768 is about 35572.1347124403. The cubic root of 1265376768 is about 1081.6164545890.

The spelling of 1265376768 in words is "one billion, two hundred sixty-five million, three hundred seventy-six thousand, seven hundred sixty-eight".