78263011412281 has 4 divisors (see below), whose sum is σ = 78265670825700. Its totient is φ = 78260351998864.

The previous prime is 78263011412279. The next prime is 78263011412291. The reversal of 78263011412281 is 18221411036287.

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 75168986700025 + 3094024712256 = 8670005^2 + 1758984^2 .

It is a cyclic number.

It is not a de Polignac number, because 78263011412281 - 2¹ = 78263011412279 is a prime.

It is a super-2 number, since 2×78263011412281² (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 (78263011412231) 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, 1329662566 + ... + 1329721423.

It is an arithmetic number, because the mean of its divisors is an integer number (19566417706425).

Almost surely, 2^{78263011412281} is an apocalyptic number.

It is an amenable number.

78263011412281 is a deficient number, since it is larger than the sum of its proper divisors (2659413419).

78263011412281 is a wasteful number, since it uses less digits than its factorization.

78263011412281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659413418.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 78263011412281 in words is "seventy-eight trillion, two hundred sixty-three billion, eleven million, four hundred twelve thousand, two hundred eighty-one".