1198487391078 has 8 divisors (see below), whose sum is σ = 2396974782168. Its totient is φ = 399495797024.

The previous prime is 1198487391077. The next prime is 1198487391173. The reversal of 1198487391078 is 8701937848911.

It is a sphenic number, since it is the product of 3 distinct primes.

1198487391078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198487391077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99873949251 + ... + 99873949262.

It is an arithmetic number, because the mean of its divisors is an integer number (299621847771).

Almost surely, 2^{1198487391078} is an apocalyptic number.

1198487391078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1198487391078 is a wasteful number, since it uses less digits than its factorization.

1198487391078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199747898518.

The product of its (nonzero) digits is 24385536, while the sum is 66.

The spelling of 1198487391078 in words is "one trillion, one hundred ninety-eight billion, four hundred eighty-seven million, three hundred ninety-one thousand, seventy-eight".