78244210213241 has 4 divisors (see below), whose sum is σ = 78254302341492. Its totient is φ = 78234118084992.

The previous prime is 78244210213237. The next prime is 78244210213319. The reversal of 78244210213241 is 14231201244287.

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 60179194125625 + 18065016087616 = 7757525^2 + 4250296^2 .

It is a cyclic number.

It is not a de Polignac number, because 78244210213241 - 2² = 78244210213237 is a prime.

It is a super-2 number, since 2×78244210213241² (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 (78240210213241) 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, 5046052496 + ... + 5046068001.

It is an arithmetic number, because the mean of its divisors is an integer number (19563575585373).

Almost surely, 2^{78244210213241} is an apocalyptic number.

It is an amenable number.

78244210213241 is a deficient number, since it is larger than the sum of its proper divisors (10092128251).

78244210213241 is a wasteful number, since it uses less digits than its factorization.

78244210213241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092128250.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 78244210213241 in words is "seventy-eight trillion, two hundred forty-four billion, two hundred ten million, two hundred thirteen thousand, two hundred forty-one".