77768477830 has 16 divisors (see below), whose sum is σ = 140765292720. Its totient is φ = 30933606112.

The previous prime is 77768477807. The next prime is 77768477837. The reversal of 77768477830 is 3877486777.

It is a super-2 number, since 2×77768477830² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77768477837) 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 7 ways as a sum of consecutive naturals, for example, 21721249 + ... + 21724828.

It is an arithmetic number, because the mean of its divisors is an integer number (8797830795).

Almost surely, 2^77768477830 is an apocalyptic number.

77768477830 is a deficient number, since it is larger than the sum of its proper divisors (62996814890).

77768477830 is a wasteful number, since it uses less digits than its factorization.

77768477830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43446263.

The product of its (nonzero) digits is 77446656, while the sum is 64.

The spelling of 77768477830 in words is "seventy-seven billion, seven hundred sixty-eight million, four hundred seventy-seven thousand, eight hundred thirty".