1645011325 has 6 divisors (see below), whose sum is σ = 2039814074. Its totient is φ = 1316009040.

The previous prime is 1645011299. The next prime is 1645011331. The reversal of 1645011325 is 5231105461.

It can be written as a sum of positive squares in 3 ways, for example, as 424277604 + 1220733721 = 20598^2 + 34939^2 .

It is not a de Polignac number, because 1645011325 - 2⁹ = 1645010813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645011293 and 1645011302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32900202 + ... + 32900251.

Almost surely, 2^1645011325 is an apocalyptic number.

It is an amenable number.

1645011325 is a deficient number, since it is larger than the sum of its proper divisors (394802749).

1645011325 is an equidigital number, since it uses as much as digits as its factorization.

1645011325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65800463 (or 65800458 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1645011325 is about 40558.7391939148. The cubic root of 1645011325 is about 1180.4736499844.

Adding to 1645011325 its reverse (5231105461), we get a palindrome (6876116786).

The spelling of 1645011325 in words is "one billion, six hundred forty-five million, eleven thousand, three hundred twenty-five".