78101010505281 has 4 divisors (see below), whose sum is σ = 104134680673712. Its totient is φ = 52067340336852.

The previous prime is 78101010505277. The next prime is 78101010505283. The reversal of 78101010505281 is 18250501010187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78101010505281 - 2² = 78101010505277 is a prime.

It is a super-2 number, since 2×78101010505281² (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 (78101010505283) 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, 13016835084211 + ... + 13016835084216.

It is an arithmetic number, because the mean of its divisors is an integer number (26033670168428).

Almost surely, 2^{78101010505281} is an apocalyptic number.

It is an amenable number.

78101010505281 is a deficient number, since it is larger than the sum of its proper divisors (26033670168431).

78101010505281 is a wasteful number, since it uses less digits than its factorization.

78101010505281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26033670168430.

The product of its (nonzero) digits is 22400, while the sum is 39.

The spelling of 78101010505281 in words is "seventy-eight trillion, one hundred one billion, ten million, five hundred five thousand, two hundred eighty-one".