1643412808704 has 88 divisors (see below), whose sum is σ = 4482161965600. Its totient is φ = 535064592384.

The previous prime is 1643412808703. The next prime is 1643412808721. The reversal of 1643412808704 is 4078082143461.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1643412808703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6088429 + ... + 6352620.

It is an arithmetic number, because the mean of its divisors is an integer number (50933658700).

Almost surely, 2^{1643412808704} is an apocalyptic number.

It is an amenable number.

1643412808704 is an abundant number, since it is smaller than the sum of its proper divisors (2838749156896).

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

1643412808704 is a wasteful number, since it uses less digits than its factorization.

1643412808704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12441115 (or 12441097 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 1643412808704 in words is "one trillion, six hundred forty-three billion, four hundred twelve million, eight hundred eight thousand, seven hundred four".