79766140041 has 45 divisors (see below), whose sum is σ = 138641928381. Its totient is φ = 45570484008.

The previous prime is 79766140007. The next prime is 79766140093. The reversal of 79766140041 is 14004166797.

The square root of 79766140041 is 282429.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 79766140041 - 2¹³ = 79766131849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79766140141) by changing a digit.

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 44 ways as a sum of consecutive naturals, for example, 17790786 + ... + 17795268.

Almost surely, 2^79766140041 is an apocalyptic number.

79766140041 is the 282429-th square number.

79766140041 is the 141215-th centered octagonal number.

It is an amenable number.

79766140041 is a deficient number, since it is larger than the sum of its proper divisors (58875788340).

79766140041 is an frugal number, since it uses more digits than its factorization.

79766140041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8992 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 79766140041 in words is "seventy-nine billion, seven hundred sixty-six million, one hundred forty thousand, forty-one".