1355136857 has 4 divisors (see below), whose sum is σ = 1358829696. Its totient is φ = 1351444020.

The previous prime is 1355136847. The next prime is 1355136869. The reversal of 1355136857 is 7586315531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1355136857 - 2¹⁰ = 1355135833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355136817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845869 + ... + 1846602.

It is an arithmetic number, because the mean of its divisors is an integer number (339707424).

Almost surely, 2^1355136857 is an apocalyptic number.

It is an amenable number.

1355136857 is a deficient number, since it is larger than the sum of its proper divisors (3692839).

1355136857 is an equidigital number, since it uses as much as digits as its factorization.

1355136857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3692838.

The product of its digits is 378000, while the sum is 44.

The square root of 1355136857 is about 36812.1835402357. The cubic root of 1355136857 is about 1106.6094785350.

The spelling of 1355136857 in words is "one billion, three hundred fifty-five million, one hundred thirty-six thousand, eight hundred fifty-seven".