79775510305 has 4 divisors (see below), whose sum is σ = 95730612372. Its totient is φ = 63820408240.

The previous prime is 79775510263. The next prime is 79775510323. The reversal of 79775510305 is 50301557797.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49732568064 + 30042942241 = 223008^2 + 173329^2 .

It is not a de Polignac number, because 79775510305 - 2¹³ = 79775502113 is a prime.

It is a super-2 number, since 2×79775510305² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7977551026 + ... + 7977551035.

It is an arithmetic number, because the mean of its divisors is an integer number (23932653093).

Almost surely, 2^79775510305 is an apocalyptic number.

It is an amenable number.

79775510305 is a deficient number, since it is larger than the sum of its proper divisors (15955102067).

79775510305 is a wasteful number, since it uses less digits than its factorization.

79775510305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15955102066.

The product of its (nonzero) digits is 1157625, while the sum is 49.

The spelling of 79775510305 in words is "seventy-nine billion, seven hundred seventy-five million, five hundred ten thousand, three hundred five".