1645126325 has 6 divisors (see below), whose sum is σ = 2039956674. Its totient is φ = 1316101040.

The previous prime is 1645126309. The next prime is 1645126339. The reversal of 1645126325 is 5236215461.

It can be written as a sum of positive squares in 3 ways, for example, as 175324081 + 1469802244 = 13241^2 + 38338^2 .

It is not a de Polignac number, because 1645126325 - 2⁴ = 1645126309 is a prime.

It is a Duffinian number.

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, 32902502 + ... + 32902551.

It is an arithmetic number, because the mean of its divisors is an integer number (339992779).

Almost surely, 2^1645126325 is an apocalyptic number.

It is an amenable number.

1645126325 is a deficient number, since it is larger than the sum of its proper divisors (394830349).

1645126325 is an equidigital number, since it uses as much as digits as its factorization.

1645126325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65805063 (or 65805058 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 1645126325 is about 40560.1568660675. The cubic root of 1645126325 is about 1180.5011576585.

The spelling of 1645126325 in words is "one billion, six hundred forty-five million, one hundred twenty-six thousand, three hundred twenty-five".