16701651561 has 8 divisors (see below), whose sum is σ = 25450135744. Its totient is φ = 9543800880.

The previous prime is 16701651557. The next prime is 16701651563. The reversal of 16701651561 is 16515610761.

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

It is not a de Polignac number, because 16701651561 - 2² = 16701651557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16701651563) by changing a digit.

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, 397658350 + ... + 397658391.

It is an arithmetic number, because the mean of its divisors is an integer number (3181266968).

Almost surely, 2^16701651561 is an apocalyptic number.

It is an amenable number.

16701651561 is a deficient number, since it is larger than the sum of its proper divisors (8748484183).

16701651561 is an equidigital number, since it uses as much as digits as its factorization.

16701651561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795316751.

The product of its (nonzero) digits is 37800, while the sum is 39.

The spelling of 16701651561 in words is "sixteen billion, seven hundred one million, six hundred fifty-one thousand, five hundred sixty-one".