1278657014403 has 4 divisors (see below), whose sum is σ = 1704876019208. Its totient is φ = 852438009600.

The previous prime is 1278657014399. The next prime is 1278657014429. The reversal of 1278657014403 is 3044107568721.

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

It is not a de Polignac number, because 1278657014403 - 2² = 1278657014399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278657014203) 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, 213109502398 + ... + 213109502403.

It is an arithmetic number, because the mean of its divisors is an integer number (426219004802).

Almost surely, 2^{1278657014403} is an apocalyptic number.

1278657014403 is a deficient number, since it is larger than the sum of its proper divisors (426219004805).

1278657014403 is an equidigital number, since it uses as much as digits as its factorization.

1278657014403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426219004804.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 1278657014403 in words is "one trillion, two hundred seventy-eight billion, six hundred fifty-seven million, fourteen thousand, four hundred three".