79525692009 has 81 divisors (see below), whose sum is σ = 123932112759. Its totient is φ = 49136202720.

The previous prime is 79525691933. The next prime is 79525692017. The reversal of 79525692009 is 90029652597.

It is a happy number.

The square root of 79525692009 is 282003.

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

79525692009 is a `hidden beast` number, since 7 + 9 + 52 + 569 + 20 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2586027609 + 76939664400 = 50853^2 + 277380^2 .

It is not a de Polignac number, because 79525692009 - 2¹¹ = 79525689961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79525692089) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1186950594 + ... + 1186950660.

Almost surely, 2^79525692009 is an apocalyptic number.

79525692009 is the 282003-rd square number.

79525692009 is the 141002-nd centered octagonal number.

It is an amenable number.

79525692009 is a deficient number, since it is larger than the sum of its proper divisors (44406420750).

79525692009 is an equidigital number, since it uses as much as digits as its factorization.

79525692009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 79525692009 in words is "seventy-nine billion, five hundred twenty-five million, six hundred ninety-two thousand, nine".