78512810454247 has 16 divisors (see below), whose sum is σ = 84597285388000. Its totient is φ = 72434770971264.

The previous prime is 78512810454241. The next prime is 78512810454271. The reversal of 78512810454247 is 74245401821587.

It is not a de Polignac number, because 78512810454247 - 2¹¹ = 78512810452199 is a prime.

It is a super-2 number, since 2×78512810454247² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78512810454191 and 78512810454200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78512810454241) 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 15 ways as a sum of consecutive naturals, for example, 961902004 + ... + 961983622.

It is an arithmetic number, because the mean of its divisors is an integer number (5287330336750).

Almost surely, 2^{78512810454247} is an apocalyptic number.

78512810454247 is a deficient number, since it is larger than the sum of its proper divisors (6084474933753).

78512810454247 is a wasteful number, since it uses less digits than its factorization.

78512810454247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120130.

The product of its (nonzero) digits is 20070400, while the sum is 58.

The spelling of 78512810454247 in words is "seventy-eight trillion, five hundred twelve billion, eight hundred ten million, four hundred fifty-four thousand, two hundred forty-seven".