1265182809660 has 1344 divisors, whose sum is σ = 5138534016000. Its totient is φ = 259248729600.

The previous prime is 1265182809659. The next prime is 1265182809679. The reversal of 1265182809660 is 669082815621.

1265182809660 is a `hidden beast` number, since 1 + 265 + 18 + 280 + 96 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1265182809597 and 1265182809606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 447 ways as a sum of consecutive naturals, for example, 5996126955 + ... + 5996127165.

It is an arithmetic number, because the mean of its divisors is an integer number (3823314000).

Almost surely, 2^{1265182809660} is an apocalyptic number.

1265182809660 is a gapful number since it is divisible by the number (10) 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 1265182809660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2569267008000).

1265182809660 is an abundant number, since it is smaller than the sum of its proper divisors (3873351206340).

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

1265182809660 is a wasteful number, since it uses less digits than its factorization.

1265182809660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 1265182809660 in words is "one trillion, two hundred sixty-five billion, one hundred eighty-two million, eight hundred nine thousand, six hundred sixty".