663625513012 has 144 divisors (see below), whose sum is σ = 1504080103680. Its totient is φ = 250598430720.

The previous prime is 663625513007. The next prime is 663625513013. The reversal of 663625513012 is 210315526366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663625513013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32958564 + ... + 32978692.

It is an arithmetic number, because the mean of its divisors is an integer number (10445000720).

Almost surely, 2^663625513012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663625513012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752040051840).

663625513012 is an abundant number, since it is smaller than the sum of its proper divisors (840454590668).

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

663625513012 is a wasteful number, since it uses less digits than its factorization.

663625513012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20462 (or 20449 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 663625513012 in words is "six hundred sixty-three billion, six hundred twenty-five million, five hundred thirteen thousand, twelve".