79779697210 has 8 divisors (see below), whose sum is σ = 143603454996. Its totient is φ = 31911878880.

The previous prime is 79779697181. The next prime is 79779697219. The reversal of 79779697210 is 1279697797.

It is a Cunningham number, because it is equal to 282453²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 79779697209 + 1 = 282453^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (79779697219) 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, 3988984851 + ... + 3988984870.

Almost surely, 2^79779697210 is an apocalyptic number.

79779697210 is a deficient number, since it is larger than the sum of its proper divisors (63823757786).

79779697210 is a wasteful number, since it uses less digits than its factorization.

79779697210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977969728.

The product of its (nonzero) digits is 21003948, while the sum is 64.

The spelling of 79779697210 in words is "seventy-nine billion, seven hundred seventy-nine million, six hundred ninety-seven thousand, two hundred ten".