1645334682436 has 27 divisors (see below), whose sum is σ = 2934930358423. Its totient is φ = 807078615200.

The previous prime is 1645334682361. The next prime is 1645334682499. The reversal of 1645334682436 is 6342864335461.

The square root of 1645334682436 is 1282706.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1159046028100 + 486288654336 = 1076590^2 + 697344^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 135960786 + ... + 135972886.

Almost surely, 2^{1645334682436} is an apocalyptic number.

1645334682436 is the 1282706-th square number.

It is an amenable number.

1645334682436 is a deficient number, since it is larger than the sum of its proper divisors (1289595675987).

1645334682436 is an frugal number, since it uses more digits than its factorization.

1645334682436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24312 (or 12156 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 55.

The spelling of 1645334682436 in words is "one trillion, six hundred forty-five billion, three hundred thirty-four million, six hundred eighty-two thousand, four hundred thirty-six".