79801779573 has 12 divisors (see below), whose sum is σ = 115275433728. Its totient is φ = 53198326440.

The previous prime is 79801779569. The next prime is 79801779613. The reversal of 79801779573 is 37597710897.

It is not a de Polignac number, because 79801779573 - 2² = 79801779569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79801779573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79801779553) 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 11 ways as a sum of consecutive naturals, for example, 54115 + ... + 403152.

It is an arithmetic number, because the mean of its divisors is an integer number (9606286144).

Almost surely, 2^79801779573 is an apocalyptic number.

It is an amenable number.

79801779573 is a deficient number, since it is larger than the sum of its proper divisors (35473654155).

79801779573 is a wasteful number, since it uses less digits than its factorization.

79801779573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476664 (or 476661 counting only the distinct ones).

The product of its (nonzero) digits is 23337720, while the sum is 63.

The spelling of 79801779573 in words is "seventy-nine billion, eight hundred one million, seven hundred seventy-nine thousand, five hundred seventy-three".