1645023093216 has 48 divisors (see below), whose sum is σ = 4324276328400. Its totient is φ = 547567607808.

The previous prime is 1645023093187. The next prime is 1645023093247. The reversal of 1645023093216 is 6123903205461.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1645023093216² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12016321 + ... + 12152448.

It is an arithmetic number, because the mean of its divisors is an integer number (90089090175).

Almost surely, 2^{1645023093216} is an apocalyptic number.

1645023093216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645023093216 is an abundant number, since it is smaller than the sum of its proper divisors (2679253235184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1645023093216 is a wasteful number, since it uses less digits than its factorization.

1645023093216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24169491 (or 24169483 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

Adding to 1645023093216 its reverse (6123903205461), we get a palindrome (7768926298677).

The spelling of 1645023093216 in words is "one trillion, six hundred forty-five billion, twenty-three million, ninety-three thousand, two hundred sixteen".