78973749198 has 80 divisors (see below), whose sum is σ = 184823598960. Its totient is φ = 25178874624.

The previous prime is 78973749149. The next prime is 78973749241. The reversal of 78973749198 is 89194737987.

78973749198 is a `hidden beast` number, since 7 + 89 + 7 + 374 + 91 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 241990 + ... + 465302.

It is an arithmetic number, because the mean of its divisors is an integer number (2310294987).

Almost surely, 2^78973749198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78973749198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92411799480).

78973749198 is an abundant number, since it is smaller than the sum of its proper divisors (105849849762).

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

78973749198 is a wasteful number, since it uses less digits than its factorization.

78973749198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223423 (or 223414 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 72.

The spelling of 78973749198 in words is "seventy-eight billion, nine hundred seventy-three million, seven hundred forty-nine thousand, one hundred ninety-eight".