7816777134345 has 16 divisors (see below), whose sum is σ = 13896492683520. Its totient is φ = 4168947804912.

The previous prime is 7816777134337. The next prime is 7816777134377. The reversal of 7816777134345 is 5434317776187.

7816777134345 is a `hidden beast` number, since 78 + 1 + 67 + 7 + 71 + 3 + 434 + 5 = 666.

It is not a de Polignac number, because 7816777134345 - 2³ = 7816777134337 is a prime.

It is a super-2 number, since 2×7816777134345² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 28951026289 + ... + 28951026558.

It is an arithmetic number, because the mean of its divisors is an integer number (868530792720).

Almost surely, 2^{7816777134345} is an apocalyptic number.

It is an amenable number.

7816777134345 is a deficient number, since it is larger than the sum of its proper divisors (6079715549175).

7816777134345 is a wasteful number, since it uses less digits than its factorization.

7816777134345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57902052861 (or 57902052855 counting only the distinct ones).

The product of its digits is 82978560, while the sum is 63.

The spelling of 7816777134345 in words is "seven trillion, eight hundred sixteen billion, seven hundred seventy-seven million, one hundred thirty-four thousand, three hundred forty-five".