1263901515255 has 12 divisors (see below), whose sum is σ = 2190762626520. Its totient is φ = 674080808112.

The previous prime is 1263901515229. The next prime is 1263901515263. The reversal of 1263901515255 is 5525151093621.

1263901515255 is a `hidden beast` number, since 1 + 2 + 6 + 390 + 1 + 5 + 1 + 5 + 255 = 666.

It is not a de Polignac number, because 1263901515255 - 2⁵ = 1263901515223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 28086700339 = 1263901515255 / (1 + 2 + 6 + 3 + 9 + 0 + 1 + 5 + 1 + 5 + 2 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1263901515255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14043350125 + ... + 14043350214.

It is an arithmetic number, because the mean of its divisors is an integer number (182563552210).

Almost surely, 2^{1263901515255} is an apocalyptic number.

1263901515255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1263901515255 is a deficient number, since it is larger than the sum of its proper divisors (926861111265).

1263901515255 is a wasteful number, since it uses less digits than its factorization.

1263901515255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28086700350 (or 28086700347 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 45.

The spelling of 1263901515255 in words is "one trillion, two hundred sixty-three billion, nine hundred one million, five hundred fifteen thousand, two hundred fifty-five".