78510055610803 has 4 divisors (see below), whose sum is σ = 78524613386568. Its totient is φ = 78495497835040.

The previous prime is 78510055610801. The next prime is 78510055610849. The reversal of 78510055610803 is 30801655001587.

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

It is a cyclic number.

It is not a de Polignac number, because 78510055610803 - 2¹ = 78510055610801 is a prime.

It is a super-2 number, since 2×78510055610803² (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 (78510055610801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7278879793 + ... + 7278890578.

It is an arithmetic number, because the mean of its divisors is an integer number (19631153346642).

Almost surely, 2^{78510055610803} is an apocalyptic number.

78510055610803 is a deficient number, since it is larger than the sum of its proper divisors (14557775765).

78510055610803 is a wasteful number, since it uses less digits than its factorization.

78510055610803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14557775764.

The product of its (nonzero) digits is 1008000, while the sum is 49.

The spelling of 78510055610803 in words is "seventy-eight trillion, five hundred ten billion, fifty-five million, six hundred ten thousand, eight hundred three".