79421355265201 has 4 divisors (see below), whose sum is σ = 79421739318900. Its totient is φ = 79420971211504.

The previous prime is 79421355265181. The next prime is 79421355265253. The reversal of 79421355265201 is 10256255312497.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49361092805025 + 30060262460176 = 7025745^2 + 5482724^2 .

It is a cyclic number.

It is not a de Polignac number, because 79421355265201 - 2⁹ = 79421355264689 is a prime.

It is a super-2 number, since 2×79421355265201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79421355245201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191716486 + ... + 192130303.

It is an arithmetic number, because the mean of its divisors is an integer number (19855434829725).

Almost surely, 2^{79421355265201} is an apocalyptic number.

It is an amenable number.

79421355265201 is a deficient number, since it is larger than the sum of its proper divisors (384053699).

79421355265201 is a wasteful number, since it uses less digits than its factorization.

79421355265201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384053698.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 79421355265201 in words is "seventy-nine trillion, four hundred twenty-one billion, three hundred fifty-five million, two hundred sixty-five thousand, two hundred one".