1155404450537 has 2 divisors, whose sum is σ = 1155404450538. Its totient is φ = 1155404450536.

The previous prime is 1155404450521. The next prime is 1155404450561. The reversal of 1155404450537 is 7350544045511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004597271616 + 150807178921 = 1002296^2 + 388339^2 .

It is an emirp because it is prime and its reverse (7350544045511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1155404450537 - 2⁴ = 1155404450521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155404450437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577702225268 + 577702225269.

It is an arithmetic number, because the mean of its divisors is an integer number (577702225269).

Almost surely, 2^{1155404450537} is an apocalyptic number.

It is an amenable number.

1155404450537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155404450537 is an equidigital number, since it uses as much as digits as its factorization.

1155404450537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 1155404450537 in words is "one trillion, one hundred fifty-five billion, four hundred four million, four hundred fifty thousand, five hundred thirty-seven".