1128207761280 has 640 divisors, whose sum is σ = 4243268462400. Its totient is φ = 285101752320.

The previous prime is 1128207761273. The next prime is 1128207761437. The reversal of 1128207761280 is 821677028211.

1128207761280 is a `hidden beast` number, since 1 + 1 + 2 + 8 + 20 + 7 + 7 + 612 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×1128207761280² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 129958540 + ... + 129967220.

Almost surely, 2^{1128207761280} is an apocalyptic number.

1128207761280 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 1128207761280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2121634231200).

1128207761280 is an abundant number, since it is smaller than the sum of its proper divisors (3115060701120).

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

1128207761280 is a wasteful number, since it uses less digits than its factorization.

1128207761280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844 (or 8823 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 1128207761280 in words is "one trillion, one hundred twenty-eight billion, two hundred seven million, seven hundred sixty-one thousand, two hundred eighty".