77616845604 has 81 divisors (see below), whose sum is σ = 199833810267. Its totient is φ = 25401451248.

The previous prime is 77616845599. The next prime is 77616845671. The reversal of 77616845604 is 40654861677.

The square root of 77616845604 is 278598.

It is a perfect power (a square), and thus also a powerful number.

77616845604 is a `hidden beast` number, since 7 + 76 + 1 + 6 + 8 + 4 + 560 + 4 = 666.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 98623299 + ... + 98624085.

Almost surely, 2^77616845604 is an apocalyptic number.

77616845604 is the 278598-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77616845604

77616845604 is an abundant number, since it is smaller than the sum of its proper divisors (122216964663).

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

77616845604 is an equidigital number, since it uses as much as digits as its factorization.

77616845604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 77616845604 in words is "seventy-seven billion, six hundred sixteen million, eight hundred forty-five thousand, six hundred four".