163687661698 has 16 divisors (see below), whose sum is σ = 268474020480. Its totient is φ = 74230848400.

The previous prime is 163687661693. The next prime is 163687661723. The reversal of 163687661698 is 896166786361.

It is not an unprimeable number, because it can be changed into a prime (163687661693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8622013 + ... + 8640976.

It is an arithmetic number, because the mean of its divisors is an integer number (16779626280).

Almost surely, 2^163687661698 is an apocalyptic number.

163687661698 is a deficient number, since it is larger than the sum of its proper divisors (104786358782).

163687661698 is a wasteful number, since it uses less digits than its factorization.

163687661698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17263433.

The product of its digits is 94058496, while the sum is 67.

The spelling of 163687661698 in words is "one hundred sixty-three billion, six hundred eighty-seven million, six hundred sixty-one thousand, six hundred ninety-eight".