79209869766 has 64 divisors (see below), whose sum is σ = 170451025920. Its totient is φ = 24460544160.

The previous prime is 79209869737. The next prime is 79209869863. The reversal of 79209869766 is 66796890297.

It is a self number, because there is not a number n which added to its sum of digits gives 79209869766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6997251 + ... + 7008561.

It is an arithmetic number, because the mean of its divisors is an integer number (2663297280).

Almost surely, 2^79209869766 is an apocalyptic number.

79209869766 is an abundant number, since it is smaller than the sum of its proper divisors (91241156154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79209869766 is a wasteful number, since it uses less digits than its factorization.

79209869766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12689.

The product of its (nonzero) digits is 123451776, while the sum is 69.

The spelling of 79209869766 in words is "seventy-nine billion, two hundred nine million, eight hundred sixty-nine thousand, seven hundred sixty-six".