78208447611 has 32 divisors (see below), whose sum is σ = 121762206720. Its totient is φ = 43724962944.

The previous prime is 78208447573. The next prime is 78208447627. The reversal of 78208447611 is 11674480287.

It is not a de Polignac number, because 78208447611 - 2³⁴ = 61028578427 is a prime.

It is a super-2 number, since 2×78208447611² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78208447661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301701 + ... + 497433.

It is an arithmetic number, because the mean of its divisors is an integer number (3805068960).

Almost surely, 2^78208447611 is an apocalyptic number.

78208447611 is a deficient number, since it is larger than the sum of its proper divisors (43553759109).

78208447611 is a wasteful number, since it uses less digits than its factorization.

78208447611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196155.

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 78208447611 in words is "seventy-eight billion, two hundred eight million, four hundred forty-seven thousand, six hundred eleven".