1265885000000 has 224 divisors, whose sum is σ = 3241666701312. Its totient is φ = 489960000000.

The previous prime is 1265884999997. The next prime is 1265885000047. The reversal of 1265885000000 is 5885621.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154995917 + ... + 155004083.

Almost surely, 2^{1265885000000} is an apocalyptic number.

1265885000000 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 1265885000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620833350656).

1265885000000 is an abundant number, since it is smaller than the sum of its proper divisors (1975781701312).

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

1265885000000 is an frugal number, since it uses more digits than its factorization.

1265885000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8245 (or 8205 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 1265885000000 in words is "one trillion, two hundred sixty-five billion, eight hundred eighty-five million", and thus it is an aban number.