1355189845 has 4 divisors (see below), whose sum is σ = 1626227820. Its totient is φ = 1084151872.

The previous prime is 1355189827. The next prime is 1355189881. The reversal of 1355189845 is 5489815531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5489815531 = 64969 ⋅84499.

It can be written as a sum of positive squares in 2 ways, for example, as 756360004 + 598829841 = 27502^2 + 24471^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355189845 - 2¹¹ = 1355187797 is a prime.

It is a super-2 number, since 2×1355189845² = 3673079031982248050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135518980 + ... + 135518989.

It is an arithmetic number, because the mean of its divisors is an integer number (406556955).

Almost surely, 2^1355189845 is an apocalyptic number.

It is an amenable number.

1355189845 is a deficient number, since it is larger than the sum of its proper divisors (271037975).

1355189845 is an equidigital number, since it uses as much as digits as its factorization.

1355189845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271037974.

The product of its digits is 864000, while the sum is 49.

The square root of 1355189845 is about 36812.9032405759. The cubic root of 1355189845 is about 1106.6239017422.

The spelling of 1355189845 in words is "one billion, three hundred fifty-five million, one hundred eighty-nine thousand, eight hundred forty-five".