77661935180 has 12 divisors (see below), whose sum is σ = 163090063920. Its totient is φ = 31064774064.

The previous prime is 77661935161. The next prime is 77661935189. The reversal of 77661935180 is 8153916677.

It is not an unprimeable number, because it can be changed into a prime (77661935189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941548360 + ... + 1941548399.

It is an arithmetic number, because the mean of its divisors is an integer number (13590838660).

Almost surely, 2^77661935180 is an apocalyptic number.

It is an amenable number.

77661935180 is an abundant number, since it is smaller than the sum of its proper divisors (85428128740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77661935180 is a wasteful number, since it uses less digits than its factorization.

77661935180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883096768 (or 3883096766 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 77661935180 in words is "seventy-seven billion, six hundred sixty-one million, nine hundred thirty-five thousand, one hundred eighty".