402505312312 has 64 divisors (see below), whose sum is σ = 790398000000. Its totient is φ = 191914060800.

The previous prime is 402505312301. The next prime is 402505312331. The reversal of 402505312312 is 213213505204.

It is a super-3 number, since 3×402505312312³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

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, 9562689 + ... + 9604687.

It is an arithmetic number, because the mean of its divisors is an integer number (12349968750).

Almost surely, 2^402505312312 is an apocalyptic number.

It is an amenable number.

402505312312 is a deficient number, since it is larger than the sum of its proper divisors (387892687688).

402505312312 is a wasteful number, since it uses less digits than its factorization.

402505312312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42544 (or 42540 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 402505312312 its reverse (213213505204), we get a palindrome (615718817516).

The spelling of 402505312312 in words is "four hundred two billion, five hundred five million, three hundred twelve thousand, three hundred twelve".