1355653681 has 2 divisors, whose sum is σ = 1355653682. Its totient is φ = 1355653680.

The previous prime is 1355653657. The next prime is 1355653687. The reversal of 1355653681 is 1863565531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1316528656 + 39125025 = 36284^2 + 6255^2 .

It is an emirp because it is prime and its reverse (1863565531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1355653681 - 2¹⁵ = 1355620913 is a prime.

It is a super-2 number, since 2×1355653681² = 3675593805617699522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1355653687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677826840 + 677826841.

It is an arithmetic number, because the mean of its divisors is an integer number (677826841).

Almost surely, 2^1355653681 is an apocalyptic number.

It is an amenable number.

1355653681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355653681 is an equidigital number, since it uses as much as digits as its factorization.

1355653681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 43.

The square root of 1355653681 is about 36819.2026122240. The cubic root of 1355653681 is about 1106.7501407475.

The spelling of 1355653681 in words is "one billion, three hundred fifty-five million, six hundred fifty-three thousand, six hundred eighty-one".