1279432128263 has 4 divisors (see below), whose sum is σ = 1309186363848. Its totient is φ = 1249677892680.

The previous prime is 1279432128257. The next prime is 1279432128269. The reversal of 1279432128263 is 3628212349721.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1279432128257) and next prime (1279432128269).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1279432128263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279432128269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14877117728 + ... + 14877117813.

It is an arithmetic number, because the mean of its divisors is an integer number (327296590962).

Almost surely, 2^{1279432128263} is an apocalyptic number.

1279432128263 is a deficient number, since it is larger than the sum of its proper divisors (29754235585).

1279432128263 is an equidigital number, since it uses as much as digits as its factorization.

1279432128263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29754235584.

The product of its digits is 1741824, while the sum is 50.

The spelling of 1279432128263 in words is "one trillion, two hundred seventy-nine billion, four hundred thirty-two million, one hundred twenty-eight thousand, two hundred sixty-three".