79872681853 has 2 divisors, whose sum is σ = 79872681854. Its totient is φ = 79872681852.

The previous prime is 79872681829. The next prime is 79872681907. The reversal of 79872681853 is 35818627897.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63926548569 + 15946133284 = 252837^2 + 126278^2 .

It is a cyclic number.

It is not a de Polignac number, because 79872681853 - 2⁹ = 79872681341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79872661853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39936340926 + 39936340927.

It is an arithmetic number, because the mean of its divisors is an integer number (39936340927).

Almost surely, 2^79872681853 is an apocalyptic number.

It is an amenable number.

79872681853 is a deficient number, since it is larger than the sum of its proper divisors (1).

79872681853 is an equidigital number, since it uses as much as digits as its factorization.

79872681853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 64.

The spelling of 79872681853 in words is "seventy-nine billion, eight hundred seventy-two million, six hundred eighty-one thousand, eight hundred fifty-three".