1645227613 has 8 divisors (see below), whose sum is σ = 1748005920. Its totient is φ = 1544068080.

The previous prime is 1645227611. The next prime is 1645227637. The reversal of 1645227613 is 3167225461.

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 1645227613 - 2¹ = 1645227611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645227611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402598 + ... + 406663.

It is an arithmetic number, because the mean of its divisors is an integer number (218500740).

Almost surely, 2^1645227613 is an apocalyptic number.

It is an amenable number.

1645227613 is a deficient number, since it is larger than the sum of its proper divisors (102778307).

1645227613 is a wasteful number, since it uses less digits than its factorization.

1645227613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809387.

The product of its digits is 60480, while the sum is 37.

The square root of 1645227613 is about 40561.4054613496. The cubic root of 1645227613 is about 1180.5253843994.

The spelling of 1645227613 in words is "one billion, six hundred forty-five million, two hundred twenty-seven thousand, six hundred thirteen".