77728441617236 has 24 divisors (see below), whose sum is σ = 136228051868160. Its totient is φ = 38806155922752.

The previous prime is 77728441617199. The next prime is 77728441617257. The reversal of 77728441617236 is 63271614482777.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19145480 + ... + 22847456.

It is an arithmetic number, because the mean of its divisors is an integer number (5676168827840).

Almost surely, 2^{77728441617236} is an apocalyptic number.

It is an amenable number.

77728441617236 is a deficient number, since it is larger than the sum of its proper divisors (58499610250924).

77728441617236 is a wasteful number, since it uses less digits than its factorization.

77728441617236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3709823 (or 3709821 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 65.

The spelling of 77728441617236 in words is "seventy-seven trillion, seven hundred twenty-eight billion, four hundred forty-one million, six hundred seventeen thousand, two hundred thirty-six".