1263543461280 has 144 divisors (see below), whose sum is σ = 4312664385120. Its totient is φ = 336880664064.

The previous prime is 1263543461273. The next prime is 1263543461311. The reversal of 1263543461280 is 821643453621.

1263543461280 is a `hidden beast` number, since 1 + 2 + 63 + 54 + 3 + 461 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7722399 + ... + 7884321.

It is an arithmetic number, because the mean of its divisors is an integer number (29949058230).

Almost surely, 2^{1263543461280} is an apocalyptic number.

1263543461280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263543461280 is an abundant number, since it is smaller than the sum of its proper divisors (3049120923840).

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

1263543461280 is a wasteful number, since it uses less digits than its factorization.

1263543461280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167363 (or 167352 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 1263543461280 in words is "one trillion, two hundred sixty-three billion, five hundred forty-three million, four hundred sixty-one thousand, two hundred eighty".