1554400250449 has 2 divisors, whose sum is σ = 1554400250450. Its totient is φ = 1554400250448.

The previous prime is 1554400250413. The next prime is 1554400250539. The reversal of 1554400250449 is 9440520044551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157223002049 + 397177248400 = 1075743^2 + 630220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554400250449 - 2⁹ = 1554400249937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1554400250149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777200125224 + 777200125225.

It is an arithmetic number, because the mean of its divisors is an integer number (777200125225).

Almost surely, 2^{1554400250449} is an apocalyptic number.

It is an amenable number.

1554400250449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554400250449 is an equidigital number, since it uses as much as digits as its factorization.

1554400250449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 1554400250449 in words is "one trillion, five hundred fifty-four billion, four hundred million, two hundred fifty thousand, four hundred forty-nine".