77813204207 has 4 divisors (see below), whose sum is σ = 77834086176. Its totient is φ = 77792322240.

The previous prime is 77813204171. The next prime is 77813204237. The reversal of 77813204207 is 70240231877.

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

It is a cyclic number.

It is not a de Polignac number, because 77813204207 - 2³⁰ = 76739462383 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 (77813204237) 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, 10435394 + ... + 10442847.

It is an arithmetic number, because the mean of its divisors is an integer number (19458521544).

Almost surely, 2^77813204207 is an apocalyptic number.

77813204207 is a deficient number, since it is larger than the sum of its proper divisors (20881969).

77813204207 is a wasteful number, since it uses less digits than its factorization.

77813204207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20881968.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 77813204207 in words is "seventy-seven billion, eight hundred thirteen million, two hundred four thousand, two hundred seven".