1645650301145 has 4 divisors (see below), whose sum is σ = 1974780361380. Its totient is φ = 1316520240912.

The previous prime is 1645650301121. The next prime is 1645650301153. The reversal of 1645650301145 is 5411030565461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 679762323529 + 965887977616 = 824477^2 + 982796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1645650301145 - 2¹⁰ = 1645650300121 is a prime.

It is a super-2 number, since 2×1645650301145² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164565030110 + ... + 164565030119.

It is an arithmetic number, because the mean of its divisors is an integer number (493695090345).

Almost surely, 2^{1645650301145} is an apocalyptic number.

It is an amenable number.

1645650301145 is a deficient number, since it is larger than the sum of its proper divisors (329130060235).

1645650301145 is an equidigital number, since it uses as much as digits as its factorization.

1645650301145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329130060234.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 1645650301145 in words is "one trillion, six hundred forty-five billion, six hundred fifty million, three hundred one thousand, one hundred forty-five".