78503722851 has 16 divisors (see below), whose sum is σ = 104933444096. Its totient is φ = 52204987296.

The previous prime is 78503722849. The next prime is 78503722859. The reversal of 78503722851 is 15822730587.

It is not a de Polignac number, because 78503722851 - 2¹ = 78503722849 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78503722851.

It is not an unprimeable number, because it can be changed into a prime (78503722859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5010636 + ... + 5026278.

It is an arithmetic number, because the mean of its divisors is an integer number (6558340256).

Almost surely, 2^78503722851 is an apocalyptic number.

78503722851 is a deficient number, since it is larger than the sum of its proper divisors (26429721245).

78503722851 is a wasteful number, since it uses less digits than its factorization.

78503722851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19722.

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 78503722851 in words is "seventy-eight billion, five hundred three million, seven hundred twenty-two thousand, eight hundred fifty-one".