16643387457356 has 96 divisors (see below), whose sum is σ = 32127926648832. Its totient is φ = 7481389443840.

The previous prime is 16643387457337. The next prime is 16643387457443. The reversal of 16643387457356 is 65375478334661.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1288480610 + ... + 1288493526.

It is an arithmetic number, because the mean of its divisors is an integer number (334665902592).

Almost surely, 2^{16643387457356} is an apocalyptic number.

It is an amenable number.

16643387457356 is a deficient number, since it is larger than the sum of its proper divisors (15484539191476).

16643387457356 is a wasteful number, since it uses less digits than its factorization.

16643387457356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13959 (or 13957 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 68.

The spelling of 16643387457356 in words is "sixteen trillion, six hundred forty-three billion, three hundred eighty-seven million, four hundred fifty-seven thousand, three hundred fifty-six".