77971047213503 has 4 divisors (see below), whose sum is σ = 77971101061368. Its totient is φ = 77970993365640.

The previous prime is 77971047213467. The next prime is 77971047213511. The reversal of 77971047213503 is 30531274017977.

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 77971047213503 - 2¹⁰ = 77971047212479 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 (77971047213593) 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, 24690176 + ... + 27668517.

It is an arithmetic number, because the mean of its divisors is an integer number (19492775265342).

Almost surely, 2^{77971047213503} is an apocalyptic number.

77971047213503 is a deficient number, since it is larger than the sum of its proper divisors (53847865).

77971047213503 is a wasteful number, since it uses less digits than its factorization.

77971047213503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53847864.

The product of its (nonzero) digits is 7779240, while the sum is 56.

The spelling of 77971047213503 in words is "seventy-seven trillion, nine hundred seventy-one billion, forty-seven million, two hundred thirteen thousand, five hundred three".