77518364971 has 4 divisors (see below), whose sum is σ = 77520485944. Its totient is φ = 77516244000.

The previous prime is 77518364969. The next prime is 77518364977. The reversal of 77518364971 is 17946381577.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17946381577 = 311 ⋅57705407.

It is a cyclic number.

It is not a de Polignac number, because 77518364971 - 2¹ = 77518364969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77518364977) 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, 1004685 + ... + 1079086.

It is an arithmetic number, because the mean of its divisors is an integer number (19380121486).

Almost surely, 2^77518364971 is an apocalyptic number.

77518364971 is a deficient number, since it is larger than the sum of its proper divisors (2120973).

77518364971 is a wasteful number, since it uses less digits than its factorization.

77518364971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120972.

The product of its digits is 8890560, while the sum is 58.

The spelling of 77518364971 in words is "seventy-seven billion, five hundred eighteen million, three hundred sixty-four thousand, nine hundred seventy-one".