1554534444649 has 2 divisors, whose sum is σ = 1554534444650. Its totient is φ = 1554534444648.

The previous prime is 1554534444641. The next prime is 1554534444709. The reversal of 1554534444649 is 9464444354551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1384846472025 + 169687972624 = 1176795^2 + 411932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554534444649 - 2³ = 1554534444641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1554534444593 and 1554534444602.

It is not a weakly prime, because it can be changed into another prime (1554534444641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777267222324 + 777267222325.

It is an arithmetic number, because the mean of its divisors is an integer number (777267222325).

Almost surely, 2^{1554534444649} is an apocalyptic number.

It is an amenable number.

1554534444649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554534444649 is an equidigital number, since it uses as much as digits as its factorization.

1554534444649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944000, while the sum is 58.

The spelling of 1554534444649 in words is "one trillion, five hundred fifty-four billion, five hundred thirty-four million, four hundred forty-four thousand, six hundred forty-nine".