78206518011 has 16 divisors (see below), whose sum is σ = 105561680000. Its totient is φ = 51496674048.

The previous prime is 78206517989. The next prime is 78206518037. The reversal of 78206518011 is 11081560287.

It is not a de Polignac number, because 78206518011 - 2¹⁴ = 78206501627 is a prime.

It is a super-2 number, since 2×78206518011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78206518081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124081 + ... + 414498.

It is an arithmetic number, because the mean of its divisors is an integer number (6597605000).

Almost surely, 2^78206518011 is an apocalyptic number.

78206518011 is a deficient number, since it is larger than the sum of its proper divisors (27355161989).

78206518011 is a wasteful number, since it uses less digits than its factorization.

78206518011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539178.

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 78206518011 in words is "seventy-eight billion, two hundred six million, five hundred eighteen thousand, eleven".