79653772901 has 8 divisors (see below), whose sum is σ = 86618729880. Its totient is φ = 72942087168.

The previous prime is 79653772871. The next prime is 79653772907. The reversal of 79653772901 is 10927735697.

It is a Cunningham number, because it is equal to 282230²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 37052400100 + 42601372801 = 192490^2 + 206401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79653772901 - 2⁶ = 79653772837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79653772907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63317156 + ... + 63318413.

It is an arithmetic number, because the mean of its divisors is an integer number (10827341235).

Almost surely, 2^79653772901 is an apocalyptic number.

It is an amenable number.

79653772901 is a deficient number, since it is larger than the sum of its proper divisors (6964956979).

79653772901 is a wasteful number, since it uses less digits than its factorization.

79653772901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126635623.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 79653772901 in words is "seventy-nine billion, six hundred fifty-three million, seven hundred seventy-two thousand, nine hundred one".