1553154051409 has 2 divisors, whose sum is σ = 1553154051410. Its totient is φ = 1553154051408.

The previous prime is 1553154051373. The next prime is 1553154051461. The reversal of 1553154051409 is 9041504513551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843280399809 + 709873651600 = 918303^2 + 842540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553154051409 - 2¹⁵ = 1553154018641 is a prime.

It is a super-2 number, since 2×1553154051409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1553154052409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776577025704 + 776577025705.

It is an arithmetic number, because the mean of its divisors is an integer number (776577025705).

Almost surely, 2^{1553154051409} is an apocalyptic number.

It is an amenable number.

1553154051409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553154051409 is an equidigital number, since it uses as much as digits as its factorization.

1553154051409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 1553154051409 in words is "one trillion, five hundred fifty-three billion, one hundred fifty-four million, fifty-one thousand, four hundred nine".