77708240218 has 32 divisors (see below), whose sum is σ = 141094407168. Its totient is φ = 31334688000.

The previous prime is 77708240173. The next prime is 77708240249. The reversal of 77708240218 is 81204280777.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 736183 + ... + 835093.

It is an arithmetic number, because the mean of its divisors is an integer number (4409200224).

Almost surely, 2^77708240218 is an apocalyptic number.

77708240218 is a deficient number, since it is larger than the sum of its proper divisors (63386166950).

77708240218 is a wasteful number, since it uses less digits than its factorization.

77708240218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102238.

The product of its (nonzero) digits is 351232, while the sum is 46.

The spelling of 77708240218 in words is "seventy-seven billion, seven hundred eight million, two hundred forty thousand, two hundred eighteen".