79448512561 has 16 divisors (see below), whose sum is σ = 89199443520. Its totient is φ = 70138393920.

The previous prime is 79448512543. The next prime is 79448512601. The reversal of 79448512561 is 16521584497.

It is not a de Polignac number, because 79448512561 - 2¹¹ = 79448510513 is a prime.

It is a super-2 number, since 2×79448512561² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79448512499 and 79448512508.

It is not an unprimeable number, because it can be changed into a prime (79448512511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403626 + ... + 567283.

It is an arithmetic number, because the mean of its divisors is an integer number (5574965220).

Almost surely, 2^79448512561 is an apocalyptic number.

It is an amenable number.

79448512561 is a deficient number, since it is larger than the sum of its proper divisors (9750930959).

79448512561 is a wasteful number, since it uses less digits than its factorization.

79448512561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971136.

The product of its digits is 2419200, while the sum is 52.

The spelling of 79448512561 in words is "seventy-nine billion, four hundred forty-eight million, five hundred twelve thousand, five hundred sixty-one".