79772689508 has 6 divisors (see below), whose sum is σ = 139602206646. Its totient is φ = 39886344752.

The previous prime is 79772689487. The next prime is 79772689541. The reversal of 79772689508 is 80598627797.

It can be written as a sum of positive squares in only one way, i.e., 70517864704 + 9254824804 = 265552^2 + 96202^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9971586185 + ... + 9971586192.

It is an arithmetic number, because the mean of its divisors is an integer number (23267034441).

Almost surely, 2^79772689508 is an apocalyptic number.

It is an amenable number.

79772689508 is a deficient number, since it is larger than the sum of its proper divisors (59829517138).

79772689508 is a wasteful number, since it uses less digits than its factorization.

79772689508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19943172381 (or 19943172379 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 68.

The spelling of 79772689508 in words is "seventy-nine billion, seven hundred seventy-two million, six hundred eighty-nine thousand, five hundred eight".