1281049641695 has 8 divisors (see below), whose sum is σ = 1537279899936. Its totient is φ = 1024826160096.

The previous prime is 1281049641653. The next prime is 1281049641713. The reversal of 1281049641695 is 5961469401821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1281049641695 - 2⁸ = 1281049641439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281049641695.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1268552 + ... + 2042381.

It is an arithmetic number, because the mean of its divisors is an integer number (192159987492).

Almost surely, 2^{1281049641695} is an apocalyptic number.

1281049641695 is a deficient number, since it is larger than the sum of its proper divisors (256230258241).

1281049641695 is an equidigital number, since it uses as much as digits as its factorization.

1281049641695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388321.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 1281049641695 in words is "one trillion, two hundred eighty-one billion, forty-nine million, six hundred forty-one thousand, six hundred ninety-five".