1549078944401 has 2 divisors, whose sum is σ = 1549078944402. Its totient is φ = 1549078944400.

The previous prime is 1549078944379. The next prime is 1549078944403. The reversal of 1549078944401 is 1044498709451.

It is a Cunningham number, because it is equal to 1244620²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1549078944400 + 1 = 1244620^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 1549078944401 - 2³⁸ = 1274201037457 is a prime.

Together with 1549078944403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1549078944403) 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 as a sum of consecutive naturals, namely, 774539472200 + 774539472201.

It is an arithmetic number, because the mean of its divisors is an integer number (774539472201).

Almost surely, 2^{1549078944401} is an apocalyptic number.

It is an amenable number.

1549078944401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1549078944401 is an equidigital number, since it uses as much as digits as its factorization.

1549078944401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 1549078944401 in words is "one trillion, five hundred forty-nine billion, seventy-eight million, nine hundred forty-four thousand, four hundred one".