77720034170 has 16 divisors (see below), whose sum is σ = 141984063648. Its totient is φ = 30624013200.

The previous prime is 77720034127. The next prime is 77720034173. The reversal of 77720034170 is 7143002777.

It is a happy number.

It is a super-2 number, since 2×77720034170² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77720034173) 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 7 ways as a sum of consecutive naturals, for example, 57999356 + ... + 58000695.

It is an arithmetic number, because the mean of its divisors is an integer number (8874003978).

Almost surely, 2^77720034170 is an apocalyptic number.

77720034170 is a deficient number, since it is larger than the sum of its proper divisors (64264029478).

77720034170 is a wasteful number, since it uses less digits than its factorization.

77720034170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116000125.

The product of its (nonzero) digits is 57624, while the sum is 38.

The spelling of 77720034170 in words is "seventy-seven billion, seven hundred twenty million, thirty-four thousand, one hundred seventy".