79771780682 has 32 divisors (see below), whose sum is σ = 135744076800. Its totient is φ = 34826209600.

The previous prime is 79771780681. The next prime is 79771780723. The reversal of 79771780682 is 28608717797.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79771780681) 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, 205457 + ... + 449172.

It is an arithmetic number, because the mean of its divisors is an integer number (4242002400).

Almost surely, 2^79771780682 is an apocalyptic number.

79771780682 is a deficient number, since it is larger than the sum of its proper divisors (55972296118).

79771780682 is a wasteful number, since it uses less digits than its factorization.

79771780682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654862.

The product of its (nonzero) digits is 16595712, while the sum is 62.

The spelling of 79771780682 in words is "seventy-nine billion, seven hundred seventy-one million, seven hundred eighty thousand, six hundred eighty-two".