1278956646033 has 8 divisors (see below), whose sum is σ = 1860300576096. Its totient is φ = 775125240000.

The previous prime is 1278956645987. The next prime is 1278956646049. The reversal of 1278956646033 is 3306466598721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1278956646033 - 2⁸ = 1278956645777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1278956646833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19378130968 + ... + 19378131033.

It is an arithmetic number, because the mean of its divisors is an integer number (232537572012).

It is a 1-persistent number, because it is pandigital, but 2⋅1278956646033 = 2557913292066 is not.

Almost surely, 2^{1278956646033} is an apocalyptic number.

It is an amenable number.

1278956646033 is a deficient number, since it is larger than the sum of its proper divisors (581343930063).

1278956646033 is a wasteful number, since it uses less digits than its factorization.

1278956646033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38756262015.

The product of its (nonzero) digits is 39191040, while the sum is 60.

The spelling of 1278956646033 in words is "one trillion, two hundred seventy-eight billion, nine hundred fifty-six million, six hundred forty-six thousand, thirty-three".