79619344561 has 9 divisors (see below), whose sum is σ = 84036047193. Its totient is φ = 75423773700.

The previous prime is 79619344547. The next prime is 79619344573. The reversal of 79619344561 is 16544391697.

The square root of 79619344561 is 282169.

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

It is a de Polignac number, because none of the positive numbers 2^k-79619344561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79619344261) 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 8 ways as a sum of consecutive naturals, for example, 5353786 + ... + 5368636.

It is an arithmetic number, because the mean of its divisors is an integer number (9337338577).

Almost surely, 2^79619344561 is an apocalyptic number.

79619344561 is the 282169-th square number.

79619344561 is the 141085-th centered octagonal number.

It is an amenable number.

79619344561 is a deficient number, since it is larger than the sum of its proper divisors (4416702632).

79619344561 is an frugal number, since it uses more digits than its factorization.

79619344561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29740 (or 14870 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 55.

The spelling of 79619344561 in words is "seventy-nine billion, six hundred nineteen million, three hundred forty-four thousand, five hundred sixty-one".