1645630001 has 8 divisors (see below), whose sum is σ = 1678535424. Its totient is φ = 1612915920.

The previous prime is 1645629989. The next prime is 1645630043. The reversal of 1645630001 is 1000365461.

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 1645630001 - 2¹⁰ = 1645628977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645630501) 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, 30401 + ... + 64926.

It is an arithmetic number, because the mean of its divisors is an integer number (209816928).

Almost surely, 2^1645630001 is an apocalyptic number.

It is an amenable number.

1645630001 is a deficient number, since it is larger than the sum of its proper divisors (32905423).

1645630001 is an equidigital number, since it uses as much as digits as its factorization.

1645630001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95671.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1645630001 is about 40566.3653905548. The cubic root of 1645630001 is about 1180.6216204303.

Adding to 1645630001 its reverse (1000365461), we get a palindrome (2645995462).

The spelling of 1645630001 in words is "one billion, six hundred forty-five million, six hundred thirty thousand, one".