67891997698 has 32 divisors (see below), whose sum is σ = 116613214848. Its totient is φ = 29039904000.

The previous prime is 67891997639. The next prime is 67891997713. The reversal of 67891997698 is 89679919876.

It is a happy number.

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 in 15 ways as a sum of consecutive naturals, for example, 23811973 + ... + 23814823.

It is an arithmetic number, because the mean of its divisors is an integer number (3644162964).

Almost surely, 2^67891997698 is an apocalyptic number.

67891997698 is a deficient number, since it is larger than the sum of its proper divisors (48721217150).

67891997698 is a wasteful number, since it uses less digits than its factorization.

67891997698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5578.

The product of its digits is 740710656, while the sum is 79.

The spelling of 67891997698 in words is "sixty-seven billion, eight hundred ninety-one million, nine hundred ninety-seven thousand, six hundred ninety-eight".