78538588617074 has 8 divisors (see below), whose sum is σ = 117840453542748. Its totient is φ = 39258437436160.

The previous prime is 78538588617011. The next prime is 78538588617121. The reversal of 78538588617074 is 47071688583587.

It can be written as a sum of positive squares in 2 ways, for example, as 52556192689225 + 25982395927849 = 7249565^2 + 5097293^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 78538588616986 and 78538588617004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428427147 + ... + 5428441614.

Almost surely, 2^{78538588617074} is an apocalyptic number.

78538588617074 is a deficient number, since it is larger than the sum of its proper divisors (39301864925674).

78538588617074 is a wasteful number, since it uses less digits than its factorization.

78538588617074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10856872380.

The product of its (nonzero) digits is 2528870400, while the sum is 77.

The spelling of 78538588617074 in words is "seventy-eight trillion, five hundred thirty-eight billion, five hundred eighty-eight million, six hundred seventeen thousand, seventy-four".