67878737898 has 16 divisors (see below), whose sum is σ = 135784371360. Its totient is φ = 22621763376.

The previous prime is 67878737887. The next prime is 67878737909. The reversal of 67878737898 is 89873787876.

It is an interprime number because it is at equal distance from previous prime (67878737887) and next prime (67878737909).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087765 + ... + 1148472.

It is an arithmetic number, because the mean of its divisors is an integer number (8486523210).

Almost surely, 2^67878737898 is an apocalyptic number.

67878737898 is an abundant number, since it is smaller than the sum of its proper divisors (67905633462).

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

67878737898 is a wasteful number, since it uses less digits than its factorization.

67878737898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241301.

The product of its digits is 1593188352, while the sum is 78.

The spelling of 67878737898 in words is "sixty-seven billion, eight hundred seventy-eight million, seven hundred thirty-seven thousand, eight hundred ninety-eight".