1643763450616 has 32 divisors (see below), whose sum is σ = 3571960826880. Its totient is φ = 694547935200.

The previous prime is 1643763450551. The next prime is 1643763450631. The reversal of 1643763450616 is 6160543673461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206706720 + ... + 206714671.

It is an arithmetic number, because the mean of its divisors is an integer number (111623775840).

Almost surely, 2^{1643763450616} is an apocalyptic number.

It is an amenable number.

1643763450616 is an abundant number, since it is smaller than the sum of its proper divisors (1928197376264).

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

1643763450616 is a wasteful number, since it uses less digits than its factorization.

1643763450616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413421475 (or 413421471 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 1643763450616 in words is "one trillion, six hundred forty-three billion, seven hundred sixty-three million, four hundred fifty thousand, six hundred sixteen".