1263889000264 has 32 divisors (see below), whose sum is σ = 2645349078240. Its totient is φ = 561134649600.

The previous prime is 1263889000259. The next prime is 1263889000273. The reversal of 1263889000264 is 4620009883621.

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 7 ways as a sum of consecutive naturals, for example, 167000577 + ... + 167008144.

It is an arithmetic number, because the mean of its divisors is an integer number (82667158695).

Almost surely, 2^{1263889000264} is an apocalyptic number.

It is an amenable number.

1263889000264 is an abundant number, since it is smaller than the sum of its proper divisors (1381460077976).

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

1263889000264 is a wasteful number, since it uses less digits than its factorization.

1263889000264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334008781 (or 334008777 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 1263889000264 in words is "one trillion, two hundred sixty-three billion, eight hundred eighty-nine million, two hundred sixty-four", and thus it is an aban number.