77853940177 has 16 divisors (see below), whose sum is σ = 84530718720. Its totient is φ = 71275825152.

The previous prime is 77853940159. The next prime is 77853940189. The reversal of 77853940177 is 77104935877.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77853940177 - 2⁷ = 77853940049 is a prime.

It is a super-2 number, since 2×77853940177² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77853941177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6827793 + ... + 6839185.

It is an arithmetic number, because the mean of its divisors is an integer number (5283169920).

Almost surely, 2^77853940177 is an apocalyptic number.

It is an amenable number.

77853940177 is a deficient number, since it is larger than the sum of its proper divisors (6676778543).

77853940177 is a wasteful number, since it uses less digits than its factorization.

77853940177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672.

The product of its (nonzero) digits is 10372320, while the sum is 58.

The spelling of 77853940177 in words is "seventy-seven billion, eight hundred fifty-three million, nine hundred forty thousand, one hundred seventy-seven".