79946537536 has 28 divisors (see below), whose sum is σ = 161244638140. Its totient is φ = 39317967360.

The previous prime is 79946537491. The next prime is 79946537537. The reversal of 79946537536 is 63573564997.

It can be written as a sum of positive squares in 2 ways, for example, as 28170265600 + 51776271936 = 167840^2 + 227544^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (79946537537) 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 3 ways as a sum of consecutive naturals, for example, 10235151 + ... + 10242958.

Almost surely, 2^79946537536 is an apocalyptic number.

It is an amenable number.

79946537536 is an abundant number, since it is smaller than the sum of its proper divisors (81298100604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79946537536 is a wasteful number, since it uses less digits than its factorization.

79946537536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20478182 (or 20478172 counting only the distinct ones).

The product of its digits is 128595600, while the sum is 64.

The spelling of 79946537536 in words is "seventy-nine billion, nine hundred forty-six million, five hundred thirty-seven thousand, five hundred thirty-six".