78867836009611 has 4 divisors (see below), whose sum is σ = 86037639283224. Its totient is φ = 71698032736000.

The previous prime is 78867836009597. The next prime is 78867836009617. The reversal of 78867836009611 is 11690063876887.

It is a happy number.

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

It is not a de Polignac number, because 78867836009611 - 2¹⁵ = 78867835976843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78867836009617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3584901636790 + ... + 3584901636811.

It is an arithmetic number, because the mean of its divisors is an integer number (21509409820806).

Almost surely, 2^{78867836009611} is an apocalyptic number.

78867836009611 is a deficient number, since it is larger than the sum of its proper divisors (7169803273613).

78867836009611 is a wasteful number, since it uses less digits than its factorization.

78867836009611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169803273612.

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 78867836009611 in words is "seventy-eight trillion, eight hundred sixty-seven billion, eight hundred thirty-six million, nine thousand, six hundred eleven".