77642389173 has 32 divisors (see below), whose sum is σ = 109423353600. Its totient is φ = 48873217536.

The previous prime is 77642389163. The next prime is 77642389189. The reversal of 77642389173 is 37198324677.

It is a happy number.

It is not a de Polignac number, because 77642389173 - 2¹⁶ = 77642323637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77642389163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2003961 + ... + 2042337.

It is an arithmetic number, because the mean of its divisors is an integer number (3419479800).

Almost surely, 2^77642389173 is an apocalyptic number.

It is an amenable number.

77642389173 is a deficient number, since it is larger than the sum of its proper divisors (31780964427).

77642389173 is a wasteful number, since it uses less digits than its factorization.

77642389173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38781.

The product of its digits is 10668672, while the sum is 57.

The spelling of 77642389173 in words is "seventy-seven billion, six hundred forty-two million, three hundred eighty-nine thousand, one hundred seventy-three".