78513251503 has 8 divisors (see below), whose sum is σ = 83504469888. Its totient is φ = 73563454464.

The previous prime is 78513251497. The next prime is 78513251519. The reversal of 78513251503 is 30515231587.

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 78513251503 - 2¹³ = 78513243311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78513251563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10351426 + ... + 10359007.

It is an arithmetic number, because the mean of its divisors is an integer number (10438058736).

Almost surely, 2^78513251503 is an apocalyptic number.

78513251503 is a deficient number, since it is larger than the sum of its proper divisors (4991218385).

78513251503 is a wasteful number, since it uses less digits than its factorization.

78513251503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20710673.

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 78513251503 in words is "seventy-eight billion, five hundred thirteen million, two hundred fifty-one thousand, five hundred three".