78813255398 has 8 divisors (see below), whose sum is σ = 122296430880. Its totient is φ = 38047778440.

The previous prime is 78813255383. The next prime is 78813255461. The reversal of 78813255398 is 89355231887.

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

It is a super-4 number, since 4×78813255398⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 679424558 + ... + 679424673.

It is an arithmetic number, because the mean of its divisors is an integer number (15287053860).

Almost surely, 2^78813255398 is an apocalyptic number.

78813255398 is a deficient number, since it is larger than the sum of its proper divisors (43483175482).

78813255398 is a wasteful number, since it uses less digits than its factorization.

78813255398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358849262.

The product of its digits is 14515200, while the sum is 59.

The spelling of 78813255398 in words is "seventy-eight billion, eight hundred thirteen million, two hundred fifty-five thousand, three hundred ninety-eight".