78501057853 has 2 divisors, whose sum is σ = 78501057854. Its totient is φ = 78501057852.

The previous prime is 78501057839. The next prime is 78501057857. The reversal of 78501057853 is 35875010587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78163858084 + 337199769 = 279578^2 + 18363^2 .

It is a cyclic number.

It is not a de Polignac number, because 78501057853 - 2⁵ = 78501057821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78501057797 and 78501057806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78501057857) 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 as a sum of consecutive naturals, namely, 39250528926 + 39250528927.

It is an arithmetic number, because the mean of its divisors is an integer number (39250528927).

Almost surely, 2^78501057853 is an apocalyptic number.

It is an amenable number.

78501057853 is a deficient number, since it is larger than the sum of its proper divisors (1).

78501057853 is an equidigital number, since it uses as much as digits as its factorization.

78501057853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176000, while the sum is 49.

The spelling of 78501057853 in words is "seventy-eight billion, five hundred one million, fifty-seven thousand, eight hundred fifty-three".