78303744730387 has 4 divisors (see below), whose sum is σ = 85422266978616. Its totient is φ = 71185222482160.

The previous prime is 78303744730363. The next prime is 78303744730411.

It is a happy number.

78303744730387 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78303744730363) and next prime (78303744730411).

It is a cyclic number.

It is not a de Polignac number, because 78303744730387 - 2¹⁹ = 78303744206099 is a prime.

It is a super-2 number, since 2×78303744730387² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78303744730487) 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 3 ways as a sum of consecutive naturals, for example, 3559261124098 + ... + 3559261124119.

It is an arithmetic number, because the mean of its divisors is an integer number (21355566744654).

Almost surely, 2^{78303744730387} is an apocalyptic number.

78303744730387 is a deficient number, since it is larger than the sum of its proper divisors (7118522248229).

78303744730387 is a wasteful number, since it uses less digits than its factorization.

78303744730387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118522248228.

The product of its (nonzero) digits is 199148544, while the sum is 64.

The spelling of 78303744730387 in words is "seventy-eight trillion, three hundred three billion, seven hundred forty-four million, seven hundred thirty thousand, three hundred eighty-seven".