79017766563 has 4 divisors (see below), whose sum is σ = 105357022088. Its totient is φ = 52678511040.

The previous prime is 79017766537. The next prime is 79017766567. The reversal of 79017766563 is 36566771097.

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

It is not a de Polignac number, because 79017766563 - 2⁸ = 79017766307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79017766567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13169627758 + ... + 13169627763.

It is an arithmetic number, because the mean of its divisors is an integer number (26339255522).

Almost surely, 2^79017766563 is an apocalyptic number.

79017766563 is a deficient number, since it is larger than the sum of its proper divisors (26339255525).

79017766563 is a wasteful number, since it uses less digits than its factorization.

79017766563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26339255524.

The product of its (nonzero) digits is 10001880, while the sum is 57.

The spelling of 79017766563 in words is "seventy-nine billion, seventeen million, seven hundred sixty-six thousand, five hundred sixty-three".