78383522538387 has 24 divisors (see below), whose sum is σ = 123520248319728. Its totient is φ = 47502542534400.

The previous prime is 78383522538379. The next prime is 78383522538397.

78383522538387 is a `hidden beast` number, since 7 + 8 + 3 + 8 + 3 + 5 + 2 + 2 + 538 + 3 + 87 = 666.

78383522538387 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78383522538387 - 2³ = 78383522538379 is a prime.

It is a super-2 number, since 2×78383522538387² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78383522538397) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20052298 + ... + 23640255.

It is an arithmetic number, because the mean of its divisors is an integer number (5146677013322).

Almost surely, 2^{78383522538387} is an apocalyptic number.

78383522538387 is a deficient number, since it is larger than the sum of its proper divisors (45136725781341).

78383522538387 is a wasteful number, since it uses less digits than its factorization.

78383522538387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43710691 (or 43710688 counting only the distinct ones).

The product of its digits is 1625702400, while the sum is 72.

The spelling of 78383522538387 in words is "seventy-eight trillion, three hundred eighty-three billion, five hundred twenty-two million, five hundred thirty-eight thousand, three hundred eighty-seven".