78327872387 has 8 divisors (see below), whose sum is σ = 81737039904. Its totient is φ = 74919005568.

The previous prime is 78327872353. The next prime is 78327872407.

78327872387 is nontrivially palindromic in base 10.

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 78327872387 - 2⁶ = 78327872323 is a prime.

It is a super-2 number, since 2×78327872387² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78327872327) 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 7 ways as a sum of consecutive naturals, for example, 577973 + ... + 700505.

It is an arithmetic number, because the mean of its divisors is an integer number (10217129988).

Almost surely, 2^78327872387 is an apocalyptic number.

78327872387 is a deficient number, since it is larger than the sum of its proper divisors (3409167517).

78327872387 is a wasteful number, since it uses less digits than its factorization.

78327872387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150349.

The product of its digits is 44255232, while the sum is 62.

The spelling of 78327872387 in words is "seventy-eight billion, three hundred twenty-seven million, eight hundred seventy-two thousand, three hundred eighty-seven".