77687241047 has 4 divisors (see below), whose sum is σ = 83663182680. Its totient is φ = 71711299416.

The previous prime is 77687241043. The next prime is 77687241067. The reversal of 77687241047 is 74014278677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74014278677 = 433 ⋅170933669.

It is a cyclic number.

It is not a de Polignac number, because 77687241047 - 2² = 77687241043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77687241047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77687241043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2987970797 + ... + 2987970822.

It is an arithmetic number, because the mean of its divisors is an integer number (20915795670).

Almost surely, 2^77687241047 is an apocalyptic number.

77687241047 is a deficient number, since it is larger than the sum of its proper divisors (5975941633).

77687241047 is a wasteful number, since it uses less digits than its factorization.

77687241047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5975941632.

The product of its (nonzero) digits is 3687936, while the sum is 53.

The spelling of 77687241047 in words is "seventy-seven billion, six hundred eighty-seven million, two hundred forty-one thousand, forty-seven".