1356671645 has 8 divisors (see below), whose sum is σ = 1860578304. Its totient is φ = 930289104.

The previous prime is 1356671623. The next prime is 1356671669. The reversal of 1356671645 is 5461766531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1356671645 - 2¹⁰ = 1356670621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1356671596 and 1356671605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19380989 + ... + 19381058.

It is an arithmetic number, because the mean of its divisors is an integer number (232572288).

Almost surely, 2^1356671645 is an apocalyptic number.

It is an amenable number.

1356671645 is a deficient number, since it is larger than the sum of its proper divisors (503906659).

1356671645 is an equidigital number, since it uses as much as digits as its factorization.

1356671645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38762059.

The product of its digits is 453600, while the sum is 44.

The square root of 1356671645 is about 36833.0238373121. The cubic root of 1356671645 is about 1107.0270919917.

The spelling of 1356671645 in words is "one billion, three hundred fifty-six million, six hundred seventy-one thousand, six hundred forty-five".