1263876265264 has 20 divisors (see below), whose sum is σ = 2555228102256. Its totient is φ = 604462561472.

The previous prime is 1263876265247. The next prime is 1263876265273. The reversal of 1263876265264 is 4625626783621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1263876265199 and 1263876265208.

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 3 ways as a sum of consecutive naturals, for example, 1717222819 + ... + 1717223554.

Almost surely, 2^{1263876265264} is an apocalyptic number.

It is an amenable number.

1263876265264 is an abundant number, since it is smaller than the sum of its proper divisors (1291351836992).

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

1263876265264 is a wasteful number, since it uses less digits than its factorization.

1263876265264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434446404 (or 3434446398 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 58.

The spelling of 1263876265264 in words is "one trillion, two hundred sixty-three billion, eight hundred seventy-six million, two hundred sixty-five thousand, two hundred sixty-four".