79881524211 has 4 divisors (see below), whose sum is σ = 106508698952. Its totient is φ = 53254349472.

The previous prime is 79881524209. The next prime is 79881524257. The reversal of 79881524211 is 11242518897.

It is a happy number.

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

It is not a de Polignac number, because 79881524211 - 2¹ = 79881524209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79881524291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13313587366 + ... + 13313587371.

It is an arithmetic number, because the mean of its divisors is an integer number (26627174738).

Almost surely, 2^79881524211 is an apocalyptic number.

79881524211 is a deficient number, since it is larger than the sum of its proper divisors (26627174741).

79881524211 is a wasteful number, since it uses less digits than its factorization.

79881524211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26627174740.

The product of its digits is 322560, while the sum is 48.

The spelling of 79881524211 in words is "seventy-nine billion, eight hundred eighty-one million, five hundred twenty-four thousand, two hundred eleven".