21160414561544 has 32 divisors (see below), whose sum is σ = 39736578936600. Its totient is φ = 10563996710400.

The previous prime is 21160414561537. The next prime is 21160414561567. The reversal of 21160414561544 is 44516541406112.

It can be written as a sum of positive squares in 4 ways, for example, as 21158620022500 + 1794539044 = 4599850^2 + 42362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21160414561495 and 21160414561504.

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 7 ways as a sum of consecutive naturals, for example, 54141194 + ... + 54530630.

Almost surely, 2^{21160414561544} is an apocalyptic number.

It is an amenable number.

21160414561544 is a deficient number, since it is larger than the sum of its proper divisors (18576164375056).

21160414561544 is a wasteful number, since it uses less digits than its factorization.

21160414561544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399833 (or 399829 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

Adding to 21160414561544 its reverse (44516541406112), we get a palindrome (65676955967656).

The spelling of 21160414561544 in words is "twenty-one trillion, one hundred sixty billion, four hundred fourteen million, five hundred sixty-one thousand, five hundred forty-four".