77842424877 has 32 divisors (see below), whose sum is σ = 121942308864. Its totient is φ = 43236763200.

The previous prime is 77842424767. The next prime is 77842424897.

77842424877 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77842424877 - 2¹² = 77842420781 is a prime.

It is a super-2 number, since 2×77842424877² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77842424877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77842424897) 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 31 ways as a sum of consecutive naturals, for example, 752502 + ... + 849672.

It is an arithmetic number, because the mean of its divisors is an integer number (3810697152).

Almost surely, 2^77842424877 is an apocalyptic number.

It is an amenable number.

77842424877 is a deficient number, since it is larger than the sum of its proper divisors (44099883987).

77842424877 is a wasteful number, since it uses less digits than its factorization.

77842424877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98249.

The product of its digits is 39337984, while the sum is 60.

The spelling of 77842424877 in words is "seventy-seven billion, eight hundred forty-two million, four hundred twenty-four thousand, eight hundred seventy-seven".