1645970966116 has 27 divisors (see below), whose sum is σ = 2903883393747. Its totient is φ = 816343630200.

The previous prime is 1645970966099. The next prime is 1645970966117. The reversal of 1645970966116 is 6116690795461.

The square root of 1645970966116 is 1282954.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645970966117) by changing a digit.

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, 325867791 + ... + 325872841.

Almost surely, 2^{1645970966116} is an apocalyptic number.

1645970966116 is the 1282954-th square number.

It is an amenable number.

1645970966116 is a deficient number, since it is larger than the sum of its proper divisors (1257912427631).

1645970966116 is an frugal number, since it uses more digits than its factorization.

1645970966116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10360 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 1645970966116 in words is "one trillion, six hundred forty-five billion, nine hundred seventy million, nine hundred sixty-six thousand, one hundred sixteen".