16168688698 has 4 divisors (see below), whose sum is σ = 24253033050. Its totient is φ = 8084344348.

The previous prime is 16168688687. The next prime is 16168688713. The reversal of 16168688698 is 89688686161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16005539169 + 163149529 = 126513^2 + 12773^2 .

It is a super-2 number, since 2×16168688698² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4042172173 + ... + 4042172176.

Almost surely, 2^16168688698 is an apocalyptic number.

16168688698 is a deficient number, since it is larger than the sum of its proper divisors (8084344352).

16168688698 is an equidigital number, since it uses as much as digits as its factorization.

16168688698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084344351.

The product of its digits is 47775744, while the sum is 67.

The spelling of 16168688698 in words is "sixteen billion, one hundred sixty-eight million, six hundred eighty-eight thousand, six hundred ninety-eight".