78864927241 has 9 divisors (see below), whose sum is σ = 81500019213. Its totient is φ = 76312472460.

The previous prime is 78864927223. The next prime is 78864927257. The reversal of 78864927241 is 14272946887.

The square root of 78864927241 is 280829.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 78864927241 - 2²¹ = 78862830089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78864927541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8701170 + ... + 8710228.

Almost surely, 2^78864927241 is an apocalyptic number.

78864927241 is the 280829-th square number.

78864927241 is the 140415-th centered octagonal number.

It is an amenable number.

78864927241 is a deficient number, since it is larger than the sum of its proper divisors (2635091972).

78864927241 is an frugal number, since it uses more digits than its factorization.

78864927241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18180 (or 9090 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The spelling of 78864927241 in words is "seventy-eight billion, eight hundred sixty-four million, nine hundred twenty-seven thousand, two hundred forty-one".