78256767206611 has 4 divisors (see below), whose sum is σ = 89436305378992. Its totient is φ = 67077229034232.

The previous prime is 78256767206561. The next prime is 78256767206647. The reversal of 78256767206611 is 11660276765287.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78256767206611 is a prime.

It is a super-2 number, since 2×78256767206611² (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 (78256767206711) 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, 5589769086180 + ... + 5589769086193.

It is an arithmetic number, because the mean of its divisors is an integer number (22359076344748).

Almost surely, 2^{78256767206611} is an apocalyptic number.

78256767206611 is a deficient number, since it is larger than the sum of its proper divisors (11179538172381).

78256767206611 is a wasteful number, since it uses less digits than its factorization.

78256767206611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11179538172380.

The product of its (nonzero) digits is 71124480, while the sum is 64.

The spelling of 78256767206611 in words is "seventy-eight trillion, two hundred fifty-six billion, seven hundred sixty-seven million, two hundred six thousand, six hundred eleven".