77767656748536 has 32 divisors (see below), whose sum is σ = 196423462927440. Its totient is φ = 25655309442048.

The previous prime is 77767656748519. The next prime is 77767656748543. The reversal of 77767656748536 is 63584765676777.

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, 16702673091 + ... + 16702677746.

Almost surely, 2^{77767656748536} is an apocalyptic number.

It is an amenable number.

77767656748536 is an abundant number, since it is smaller than the sum of its proper divisors (118655806178904).

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

77767656748536 is a wasteful number, since it uses less digits than its factorization.

77767656748536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33405350943 (or 33405350939 counting only the distinct ones).

The product of its digits is 52276492800, while the sum is 84.

The spelling of 77767656748536 in words is "seventy-seven trillion, seven hundred sixty-seven billion, six hundred fifty-six million, seven hundred forty-eight thousand, five hundred thirty-six".