78324655642387 has 16 divisors (see below), whose sum is σ = 97651974034944. Its totient is φ = 61031914632000.

The previous prime is 78324655642381. The next prime is 78324655642391.

78324655642387 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78324655642387 is a prime.

It is a super-3 number, since 3×78324655642387³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (78324655642381) 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 15 ways as a sum of consecutive naturals, for example, 15078562 + ... + 19596232.

It is an arithmetic number, because the mean of its divisors is an integer number (6103248377184).

Almost surely, 2^{78324655642387} is an apocalyptic number.

78324655642387 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

78324655642387 is a deficient number, since it is larger than the sum of its proper divisors (19327318392557).

78324655642387 is a wasteful number, since it uses less digits than its factorization.

78324655642387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742850.

The product of its digits is 1625702400, while the sum is 70.

The spelling of 78324655642387 in words is "seventy-eight trillion, three hundred twenty-four billion, six hundred fifty-five million, six hundred forty-two thousand, three hundred eighty-seven".