1344637656401 has 16 divisors (see below), whose sum is σ = 1494841635840. Its totient is φ = 1201118276160.

The previous prime is 1344637656391. The next prime is 1344637656403. The reversal of 1344637656401 is 1046567364431.

It is a cyclic number.

It is not a de Polignac number, because 1344637656401 - 2¹⁰ = 1344637655377 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 1344637656401.

It is not an unprimeable number, because it can be changed into a prime (1344637656403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14085236 + ... + 14180378.

It is an arithmetic number, because the mean of its divisors is an integer number (93427602240).

Almost surely, 2^{1344637656401} is an apocalyptic number.

It is an amenable number.

1344637656401 is a deficient number, since it is larger than the sum of its proper divisors (150203979439).

1344637656401 is a wasteful number, since it uses less digits than its factorization.

1344637656401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130256.

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 1344637656401 in words is "one trillion, three hundred forty-four billion, six hundred thirty-seven million, six hundred fifty-six thousand, four hundred one".