1355456645 has 4 divisors (see below), whose sum is σ = 1626547980. Its totient is φ = 1084365312.

The previous prime is 1355456639. The next prime is 1355456657. The reversal of 1355456645 is 5466545531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395572321 + 959884324 = 19889^2 + 30982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355456645 - 2¹⁶ = 1355391109 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1355456596 and 1355456605.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 135545660 + ... + 135545669.

It is an arithmetic number, because the mean of its divisors is an integer number (406636995).

Almost surely, 2^1355456645 is an apocalyptic number.

It is an amenable number.

1355456645 is a deficient number, since it is larger than the sum of its proper divisors (271091335).

1355456645 is an equidigital number, since it uses as much as digits as its factorization.

1355456645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271091334.

The product of its digits is 1080000, while the sum is 44.

The square root of 1355456645 is about 36816.5267916462. The cubic root of 1355456645 is about 1106.6965183537.

The spelling of 1355456645 in words is "one billion, three hundred fifty-five million, four hundred fifty-six thousand, six hundred forty-five".