1645365697 has 8 divisors (see below), whose sum is σ = 1718297280. Its totient is φ = 1572550320.

The previous prime is 1645365647. The next prime is 1645365719. The reversal of 1645365697 is 7965635461.

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-1645365697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645365637) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 547 + ... + 57367.

It is an arithmetic number, because the mean of its divisors is an integer number (214787160).

Almost surely, 2^1645365697 is an apocalyptic number.

It is an amenable number.

1645365697 is a deficient number, since it is larger than the sum of its proper divisors (72931583).

1645365697 is a wasteful number, since it uses less digits than its factorization.

1645365697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58103.

The product of its digits is 4082400, while the sum is 52.

The square root of 1645365697 is about 40563.1075855882. The cubic root of 1645365697 is about 1180.5584106517.

The spelling of 1645365697 in words is "one billion, six hundred forty-five million, three hundred sixty-five thousand, six hundred ninety-seven".