77633360340845 has 4 divisors (see below), whose sum is σ = 93160032409020. Its totient is φ = 62106688272672.

The previous prime is 77633360340803. The next prime is 77633360340881. The reversal of 77633360340845 is 54804306333677.

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 33870875177161 + 43762485163684 = 5819869^2 + 6615322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77633360340845 is a prime.

It is a super-2 number, since 2×77633360340845² (a number of 29 digits) contains 22 as substring.

It is a congruent 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, 7763336034080 + ... + 7763336034089.

It is an arithmetic number, because the mean of its divisors is an integer number (23290008102255).

Almost surely, 2^{77633360340845} is an apocalyptic number.

It is an amenable number.

77633360340845 is a deficient number, since it is larger than the sum of its proper divisors (15526672068175).

77633360340845 is a wasteful number, since it uses less digits than its factorization.

77633360340845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15526672068174.

The product of its (nonzero) digits is 91445760, while the sum is 59.

The spelling of 77633360340845 in words is "seventy-seven trillion, six hundred thirty-three billion, three hundred sixty million, three hundred forty thousand, eight hundred forty-five".