16516969686 has 240 divisors, whose sum is σ = 45826426800. Its totient is φ = 4420749312.

The previous prime is 16516969673. The next prime is 16516969699. The reversal of 16516969686 is 68696961561.

It is an interprime number because it is at equal distance from previous prime (16516969673) and next prime (16516969699).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14629170 + ... + 14630298.

It is an arithmetic number, because the mean of its divisors is an integer number (190943445).

Almost surely, 2^16516969686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16516969686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22913213400).

16516969686 is an abundant number, since it is smaller than the sum of its proper divisors (29309457114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16516969686 is a wasteful number, since it uses less digits than its factorization.

16516969686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273 (or 1257 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 16516969686 in words is "sixteen billion, five hundred sixteen million, nine hundred sixty-nine thousand, six hundred eighty-six".