1645432263304 has 16 divisors (see below), whose sum is σ = 3085818165900. Its totient is φ = 822547419072.

The previous prime is 1645432263283. The next prime is 1645432263359. The reversal of 1645432263304 is 4033622345461.

It can be written as a sum of positive squares in 2 ways, for example, as 1633544722404 + 11887540900 = 1278102^2 + 109030^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21047619 + ... + 21125650.

Almost surely, 2^{1645432263304} is an apocalyptic number.

It is an amenable number.

1645432263304 is a deficient number, since it is larger than the sum of its proper divisors (1440385902596).

1645432263304 is a wasteful number, since it uses less digits than its factorization.

1645432263304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42178152 (or 42178148 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

The spelling of 1645432263304 in words is "one trillion, six hundred forty-five billion, four hundred thirty-two million, two hundred sixty-three thousand, three hundred four".