77323516737556 has 12 divisors (see below), whose sum is σ = 139982228576820. Its totient is φ = 37328594287040.

The previous prime is 77323516737553. The next prime is 77323516737583. The reversal of 77323516737556 is 65573761532377.

It can be written as a sum of positive squares in 2 ways, for example, as 47664056135056 + 29659460602500 = 6903916^2 + 5446050^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77323516737491 and 77323516737500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77323516737553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333291020305 + ... + 333291020536.

It is an arithmetic number, because the mean of its divisors is an integer number (11665185714735).

Almost surely, 2^{77323516737556} is an apocalyptic number.

It is an amenable number.

77323516737556 is a deficient number, since it is larger than the sum of its proper divisors (62658711839264).

77323516737556 is a wasteful number, since it uses less digits than its factorization.

77323516737556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666582040874 (or 666582040872 counting only the distinct ones).

The product of its digits is 583443000, while the sum is 67.

The spelling of 77323516737556 in words is "seventy-seven trillion, three hundred twenty-three billion, five hundred sixteen million, seven hundred thirty-seven thousand, five hundred fifty-six".