79843725281 has 8 divisors (see below), whose sum is σ = 81004132800. Its totient is φ = 78684313680.

The previous prime is 79843725229. The next prime is 79843725329. The reversal of 79843725281 is 18252734897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79843725281 - 2¹⁴ = 79843708897 is a prime.

It is a super-2 number, since 2×79843725281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79843725211) 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 in 7 ways as a sum of consecutive naturals, for example, 86711 + ... + 408908.

It is an arithmetic number, because the mean of its divisors is an integer number (10125516600).

Almost surely, 2^79843725281 is an apocalyptic number.

79843725281 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

79843725281 is the 126368-th centered decagonal number.

It is an amenable number.

79843725281 is a deficient number, since it is larger than the sum of its proper divisors (1160407519).

79843725281 is a wasteful number, since it uses less digits than its factorization.

79843725281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497959.

The product of its digits is 6773760, while the sum is 56.

The spelling of 79843725281 in words is "seventy-nine billion, eight hundred forty-three million, seven hundred twenty-five thousand, two hundred eighty-one".