1645737364080 has 480 divisors, whose sum is σ = 5948007945984. Its totient is φ = 406293110784.

The previous prime is 1645737364049. The next prime is 1645737364093. The reversal of 1645737364080 is 804637375461.

It is a happy number.

1645737364080 is a `hidden beast` number, since 1 + 6 + 4 + 573 + 7 + 3 + 64 + 0 + 8 + 0 = 666.

It is a congruent 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 95 ways as a sum of consecutive naturals, for example, 920948947 + ... + 920950733.

Almost surely, 2^{1645737364080} is an apocalyptic number.

1645737364080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1645737364080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2974003972992).

1645737364080 is an abundant number, since it is smaller than the sum of its proper divisors (4302270581904).

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

1645737364080 is a wasteful number, since it uses less digits than its factorization.

1645737364080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 1645737364080 in words is "one trillion, six hundred forty-five billion, seven hundred thirty-seven million, three hundred sixty-four thousand, eighty".