78003305749 has 8 divisors (see below), whose sum is σ = 78080886072. Its totient is φ = 77925758400.

The previous prime is 78003305747. The next prime is 78003305759. The reversal of 78003305749 is 94750330087.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72472408849 + 5530896900 = 269207^2 + 74370^2 .

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 78003305749 - 2¹ = 78003305747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78003305699 and 78003305708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78003305747) 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, 9624799 + ... + 9632899.

It is an arithmetic number, because the mean of its divisors is an integer number (9760110759).

Almost surely, 2^78003305749 is an apocalyptic number.

It is an amenable number.

78003305749 is a deficient number, since it is larger than the sum of its proper divisors (77580323).

78003305749 is a wasteful number, since it uses less digits than its factorization.

78003305749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487.

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 78003305749 in words is "seventy-eight billion, three million, three hundred five thousand, seven hundred forty-nine".