813252400012 has 24 divisors (see below), whose sum is σ = 1532868484896. Its totient is φ = 375298159488.

The previous prime is 813252400001. The next prime is 813252400127. The reversal of 813252400012 is 210004252318.

It is a super-2 number, since 2×813252400012² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620128 + ... + 1418119.

It is an arithmetic number, because the mean of its divisors is an integer number (63869520204).

Almost surely, 2^813252400012 is an apocalyptic number.

It is an amenable number.

813252400012 is a deficient number, since it is larger than the sum of its proper divisors (719616084884).

813252400012 is a wasteful number, since it uses less digits than its factorization.

813252400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045937 (or 2045935 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 813252400012 in words is "eight hundred thirteen billion, two hundred fifty-two million, four hundred thousand, twelve".