1278532260000 has 360 divisors, whose sum is σ = 4810594432644. Its totient is φ = 320885760000.

The previous prime is 1278532259987. The next prime is 1278532260037. The reversal of 1278532260000 is 622358721.

1278532260000 is a `hidden beast` number, since 1 + 27 + 8 + 5 + 3 + 22 + 600 + 0 + 0 = 666.

It can be written as a sum of positive squares in 10 ways, for example, as 78639863184 + 1199892396816 = 280428^2 + 1095396^2 .

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2851090 + ... + 3268910.

Almost surely, 2^{1278532260000} is an apocalyptic number.

1278532260000 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 1278532260000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405297216322).

1278532260000 is an abundant number, since it is smaller than the sum of its proper divisors (3532062172644).

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

1278532260000 is a wasteful number, since it uses less digits than its factorization.

1278532260000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417874 (or 417848 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 1278532260000 in words is "one trillion, two hundred seventy-eight billion, five hundred thirty-two million, two hundred sixty thousand".