79766541009 has 24 divisors (see below), whose sum is σ = 118711187712. Its totient is φ = 51585636480.

The previous prime is 79766540951. The next prime is 79766541047. The reversal of 79766541009 is 90014566797.

79766541009 is a `hidden beast` number, since 7 + 97 + 6 + 6 + 541 + 0 + 0 + 9 = 666.

It is not a de Polignac number, because 79766541009 - 2²³ = 79758152401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79766541059) 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 23 ways as a sum of consecutive naturals, for example, 786597 + ... + 882194.

It is an arithmetic number, because the mean of its divisors is an integer number (4946299488).

Almost surely, 2^79766541009 is an apocalyptic number.

It is an amenable number.

79766541009 is a deficient number, since it is larger than the sum of its proper divisors (38944646703).

79766541009 is a wasteful number, since it uses less digits than its factorization.

79766541009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668957 (or 1668954 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 79766541009 in words is "seventy-nine billion, seven hundred sixty-six million, five hundred forty-one thousand, nine".