78181116226751 has 8 divisors (see below), whose sum is σ = 79776938713824. Its totient is φ = 76599478828800.

The previous prime is 78181116226729. The next prime is 78181116226769. The reversal of 78181116226751 is 15762261118187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78181116226751 - 2⁶ = 78181116226687 is a prime.

It is a super-2 number, since 2×78181116226751² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78181116223751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3546261146 + ... + 3546283191.

It is an arithmetic number, because the mean of its divisors is an integer number (9972117339228).

Almost surely, 2^{78181116226751} is an apocalyptic number.

78181116226751 is a deficient number, since it is larger than the sum of its proper divisors (1595822487073).

78181116226751 is a wasteful number, since it uses less digits than its factorization.

78181116226751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7092544561.

The product of its digits is 2257920, while the sum is 56.

The spelling of 78181116226751 in words is "seventy-eight trillion, one hundred eighty-one billion, one hundred sixteen million, two hundred twenty-six thousand, seven hundred fifty-one".