77629870877 has 4 divisors (see below), whose sum is σ = 83601399420. Its totient is φ = 71658342336.

The previous prime is 77629870861. The next prime is 77629870919. The reversal of 77629870877 is 77807892677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77807892677 = 67 ⋅1161311831.

It can be written as a sum of positive squares in 2 ways, for example, as 49402174756 + 28227696121 = 222266^2 + 168011^2 .

It is a cyclic number.

It is not a de Polignac number, because 77629870877 - 2⁴ = 77629870861 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 (77629870807) 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, 2985764252 + ... + 2985764277.

It is an arithmetic number, because the mean of its divisors is an integer number (20900349855).

Almost surely, 2^77629870877 is an apocalyptic number.

It is an amenable number.

77629870877 is a deficient number, since it is larger than the sum of its proper divisors (5971528543).

77629870877 is a wasteful number, since it uses less digits than its factorization.

77629870877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971528542.

The product of its (nonzero) digits is 116169984, while the sum is 68.

The spelling of 77629870877 in words is "seventy-seven billion, six hundred twenty-nine million, eight hundred seventy thousand, eight hundred seventy-seven".