16549646662544 has 40 divisors (see below), whose sum is σ = 32869401949080. Its totient is φ = 8069767630848.

The previous prime is 16549646662537. The next prime is 16549646662603. The reversal of 16549646662544 is 44526664694561.

It can be written as a sum of positive squares in 4 ways, for example, as 3024816640000 + 13524830022544 = 1739200^2 + 3677612^2 .

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, 79498397 + ... + 79706300.

It is an arithmetic number, because the mean of its divisors is an integer number (821735048727).

Almost surely, 2^{16549646662544} is an apocalyptic number.

It is an amenable number.

16549646662544 is a deficient number, since it is larger than the sum of its proper divisors (16319755286536).

16549646662544 is a wasteful number, since it uses less digits than its factorization.

16549646662544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159204867 (or 159204861 counting only the distinct ones).

The product of its digits is 895795200, while the sum is 68.

The spelling of 16549646662544 in words is "sixteen trillion, five hundred forty-nine billion, six hundred forty-six million, six hundred sixty-two thousand, five hundred forty-four".