1355855881 has 2 divisors, whose sum is σ = 1355855882. Its totient is φ = 1355855880.

The previous prime is 1355855873. The next prime is 1355855899. The reversal of 1355855881 is 1885585531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074790656 + 281065225 = 32784^2 + 16765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355855881 - 2³ = 1355855873 is a prime.

It is a super-3 number, since 3×1355855881³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1355855581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677927940 + 677927941.

It is an arithmetic number, because the mean of its divisors is an integer number (677927941).

Almost surely, 2^1355855881 is an apocalyptic number.

It is an amenable number.

1355855881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355855881 is an equidigital number, since it uses as much as digits as its factorization.

1355855881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960000, while the sum is 49.

The square root of 1355855881 is about 36821.9483596401. The cubic root of 1355855881 is about 1106.8051630974.

The spelling of 1355855881 in words is "one billion, three hundred fifty-five million, eight hundred fifty-five thousand, eight hundred eighty-one".