1645052313 has 8 divisors (see below), whose sum is σ = 2221168000. Its totient is φ = 1082819088.

The previous prime is 1645052267. The next prime is 1645052359. The reversal of 1645052313 is 3132505461.

It is an interprime number because it is at equal distance from previous prime (1645052267) and next prime (1645052359).

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

It is a de Polignac number, because none of the positive numbers 2^k-1645052313 is a prime.

It is a super-2 number, since 2×1645052313² = 5412394225013299938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645052363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3470338 + ... + 3470811.

It is an arithmetic number, because the mean of its divisors is an integer number (277646000).

Almost surely, 2^1645052313 is an apocalyptic number.

It is an amenable number.

1645052313 is a deficient number, since it is larger than the sum of its proper divisors (576115687).

1645052313 is an equidigital number, since it uses as much as digits as its factorization.

1645052313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941231.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 1645052313 is about 40559.2444826084. The cubic root of 1645052313 is about 1180.4834543449.

Adding to 1645052313 its reverse (3132505461), we get a palindrome (4777557774).

The spelling of 1645052313 in words is "one billion, six hundred forty-five million, fifty-two thousand, three hundred thirteen".