1355556946 has 4 divisors (see below), whose sum is σ = 2033335422. Its totient is φ = 677778472.

The previous prime is 1355556907. The next prime is 1355556977. The reversal of 1355556946 is 6496555531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6496555531 = 877 ⋅7407703.

It can be written as a sum of positive squares in only one way, i.e., 1342416321 + 13140625 = 36639^2 + 3625^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1355556946.

It is an unprimeable number.

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, 338889235 + ... + 338889238.

Almost surely, 2^1355556946 is an apocalyptic number.

1355556946 is a deficient number, since it is larger than the sum of its proper divisors (677778476).

1355556946 is an equidigital number, since it uses as much as digits as its factorization.

1355556946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677778475.

The product of its digits is 2430000, while the sum is 49.

The square root of 1355556946 is about 36817.8889400248. Note that the first 3 decimals coincide. The cubic root of 1355556946 is about 1106.7238154348.

The spelling of 1355556946 in words is "one billion, three hundred fifty-five million, five hundred fifty-six thousand, nine hundred forty-six".