1553434900273 has 2 divisors, whose sum is σ = 1553434900274. Its totient is φ = 1553434900272.

The previous prime is 1553434900249. The next prime is 1553434900313. The reversal of 1553434900273 is 3720094343551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118670059584 + 434764840689 = 1057672^2 + 659367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553434900273 - 2⁹ = 1553434899761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1553434900243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776717450136 + 776717450137.

It is an arithmetic number, because the mean of its divisors is an integer number (776717450137).

Almost surely, 2^{1553434900273} is an apocalyptic number.

It is an amenable number.

1553434900273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553434900273 is an equidigital number, since it uses as much as digits as its factorization.

1553434900273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 1553434900273 in words is "one trillion, five hundred fifty-three billion, four hundred thirty-four million, nine hundred thousand, two hundred seventy-three".