78231504377805 has 8 divisors (see below), whose sum is σ = 125170407004512. Its totient is φ = 41723469001488.

The previous prime is 78231504377791. The next prime is 78231504377809. The reversal of 78231504377805 is 50877340513287.

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

It is not a de Polignac number, because 78231504377805 - 2¹⁷ = 78231504246733 is a prime.

It is a super-2 number, since 2×78231504377805² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78231504377809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2607716812579 + ... + 2607716812608.

It is an arithmetic number, because the mean of its divisors is an integer number (15646300875564).

Almost surely, 2^{78231504377805} is an apocalyptic number.

It is an amenable number.

78231504377805 is a deficient number, since it is larger than the sum of its proper divisors (46938902626707).

78231504377805 is a wasteful number, since it uses less digits than its factorization.

78231504377805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215433625195.

The product of its (nonzero) digits is 39513600, while the sum is 60.

The spelling of 78231504377805 in words is "seventy-eight trillion, two hundred thirty-one billion, five hundred four million, three hundred seventy-seven thousand, eight hundred five".