78148638811585 has 8 divisors (see below), whose sum is σ = 93778487732160. Its totient is φ = 62518830277104.

The previous prime is 78148638811583. The next prime is 78148638811637. The reversal of 78148638811585 is 58511883684187.

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

It is a cyclic number.

It is not a de Polignac number, because 78148638811585 - 2¹ = 78148638811583 is a prime.

It is a super-2 number, since 2×78148638811585² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78148638811583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5662405 + ... + 13724434.

It is an arithmetic number, because the mean of its divisors is an integer number (11722310966520).

Almost surely, 2^{78148638811585} is an apocalyptic number.

It is an amenable number.

78148638811585 is a deficient number, since it is larger than the sum of its proper divisors (15629848920575).

78148638811585 is a wasteful number, since it uses less digits than its factorization.

78148638811585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20193047.

The product of its digits is 412876800, while the sum is 73.

The spelling of 78148638811585 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred thirty-eight million, eight hundred eleven thousand, five hundred eighty-five".