79909412788 has 12 divisors (see below), whose sum is σ = 143252240292. Its totient is φ = 38980201280.

The previous prime is 79909412743. The next prime is 79909412809. The reversal of 79909412788 is 88721490997.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44995742884 + 34913669904 = 212122^2 + 186852^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243626095 + ... + 243626422.

It is an arithmetic number, because the mean of its divisors is an integer number (11937686691).

Almost surely, 2^79909412788 is an apocalyptic number.

It is an amenable number.

79909412788 is a deficient number, since it is larger than the sum of its proper divisors (63342827504).

79909412788 is a wasteful number, since it uses less digits than its factorization.

79909412788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487252562 (or 487252560 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 64.

The spelling of 79909412788 in words is "seventy-nine billion, nine hundred nine million, four hundred twelve thousand, seven hundred eighty-eight".