1263316234551 has 16 divisors (see below), whose sum is σ = 1925080597248. Its totient is φ = 721884758400.

The previous prime is 1263316234549. The next prime is 1263316234553. The reversal of 1263316234551 is 1554326133621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1263316234549) and next prime (1263316234553).

It is not a de Polignac number, because 1263316234551 - 2¹ = 1263316234549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263316234553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242271 + ... + 2017391.

It is an arithmetic number, because the mean of its divisors is an integer number (120317537328).

Almost surely, 2^{1263316234551} is an apocalyptic number.

1263316234551 is a deficient number, since it is larger than the sum of its proper divisors (661764362697).

1263316234551 is an equidigital number, since it uses as much as digits as its factorization.

1263316234551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852742.

The product of its digits is 388800, while the sum is 42.

The spelling of 1263316234551 in words is "one trillion, two hundred sixty-three billion, three hundred sixteen million, two hundred thirty-four thousand, five hundred fifty-one".