77181620306 has 32 divisors (see below), whose sum is σ = 141795498240. Its totient is φ = 30784539456.

The previous prime is 77181620303. The next prime is 77181620339. The reversal of 77181620306 is 60302618177.

It is not an unprimeable number, because it can be changed into a prime (77181620303) 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, 3227201 + ... + 3251028.

It is an arithmetic number, because the mean of its divisors is an integer number (4431109320).

Almost surely, 2^77181620306 is an apocalyptic number.

77181620306 is a deficient number, since it is larger than the sum of its proper divisors (64613877934).

77181620306 is a wasteful number, since it uses less digits than its factorization.

77181620306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478298.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 77181620306 in words is "seventy-seven billion, one hundred eighty-one million, six hundred twenty thousand, three hundred six".