1645927427 has 8 divisors (see below), whose sum is σ = 1671168000. Its totient is φ = 1620706824.

The previous prime is 1645927397. The next prime is 1645927429. The reversal of 1645927427 is 7247295461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645927427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645927429) 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, 318974 + ... + 324092.

It is an arithmetic number, because the mean of its divisors is an integer number (208896000).

Almost surely, 2^1645927427 is an apocalyptic number.

1645927427 is a deficient number, since it is larger than the sum of its proper divisors (25240573).

1645927427 is an equidigital number, since it uses as much as digits as its factorization.

1645927427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9985.

The product of its digits is 846720, while the sum is 47.

The square root of 1645927427 is about 40570.0311436903. The cubic root of 1645927427 is about 1180.6927434273.

The spelling of 1645927427 in words is "one billion, six hundred forty-five million, nine hundred twenty-seven thousand, four hundred twenty-seven".