1265890080000 has 1440 divisors, whose sum is σ = 5265804603136. Its totient is φ = 262766592000.

The previous prime is 1265890079989. The next prime is 1265890080079. The reversal of 1265890080000 is 800985621.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3188639802 + ... + 3188640198.

Almost surely, 2^{1265890080000} is an apocalyptic number.

1265890080000 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 1265890080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632902301568).

1265890080000 is an abundant number, since it is smaller than the sum of its proper divisors (3999914523136).

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

1265890080000 is an equidigital number, since it uses as much as digits as its factorization.

1265890080000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 1265890080000 in words is "one trillion, two hundred sixty-five billion, eight hundred ninety million, eighty thousand".