16986363402561 has 8 divisors (see below), whose sum is σ = 25883982327744. Its totient is φ = 9706493372880.

The previous prime is 16986363402557. The next prime is 16986363402577. The reversal of 16986363402561 is 16520436368961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16986363402561 - 2² = 16986363402557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16986363402495 and 16986363402504.

It is not an unprimeable number, because it can be changed into a prime (16986363402581) 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, 404437223850 + ... + 404437223891.

It is an arithmetic number, because the mean of its divisors is an integer number (3235497790968).

Almost surely, 2^{16986363402561} is an apocalyptic number.

It is an amenable number.

16986363402561 is a deficient number, since it is larger than the sum of its proper divisors (8897618925183).

16986363402561 is an equidigital number, since it uses as much as digits as its factorization.

16986363402561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808874447751.

The product of its (nonzero) digits is 33592320, while the sum is 60.

The spelling of 16986363402561 in words is "sixteen trillion, nine hundred eighty-six billion, three hundred sixty-three million, four hundred two thousand, five hundred sixty-one".