79286450645 has 4 divisors (see below), whose sum is σ = 95143740780. Its totient is φ = 63429160512.

The previous prime is 79286450641. The next prime is 79286450693. The reversal of 79286450645 is 54605468297.

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 18868319044 + 60418131601 = 137362^2 + 245801^2 .

It is a cyclic number.

It is not a de Polignac number, because 79286450645 - 2² = 79286450641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79286450641) 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, 7928645060 + ... + 7928645069.

It is an arithmetic number, because the mean of its divisors is an integer number (23785935195).

Almost surely, 2^79286450645 is an apocalyptic number.

It is an amenable number.

79286450645 is a deficient number, since it is larger than the sum of its proper divisors (15857290135).

79286450645 is a wasteful number, since it uses less digits than its factorization.

79286450645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15857290134.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 79286450645 in words is "seventy-nine billion, two hundred eighty-six million, four hundred fifty thousand, six hundred forty-five".