1155406144553 has 2 divisors, whose sum is σ = 1155406144554. Its totient is φ = 1155406144552.

The previous prime is 1155406144517. The next prime is 1155406144583. The reversal of 1155406144553 is 3554416045511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1154943550489 + 462594064 = 1074683^2 + 21508^2 .

It is an emirp because it is prime and its reverse (3554416045511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155406144553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155406144583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577703072276 + 577703072277.

It is an arithmetic number, because the mean of its divisors is an integer number (577703072277).

Almost surely, 2^{1155406144553} is an apocalyptic number.

It is an amenable number.

1155406144553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155406144553 is an equidigital number, since it uses as much as digits as its factorization.

1155406144553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 1155406144553 in words is "one trillion, one hundred fifty-five billion, four hundred six million, one hundred forty-four thousand, five hundred fifty-three".