12630556665 has 32 divisors (see below), whose sum is σ = 22465612800. Its totient is φ = 6732910080.

The previous prime is 12630556649. The next prime is 12630556667. The reversal of 12630556665 is 56665503621.

It is not a de Polignac number, because 12630556665 - 2⁴ = 12630556649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12630556665.

It is not an unprimeable number, because it can be changed into a prime (12630556667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258456 + ... + 303414.

It is an arithmetic number, because the mean of its divisors is an integer number (702050400).

Almost surely, 2^12630556665 is an apocalyptic number.

12630556665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12630556665 is a deficient number, since it is larger than the sum of its proper divisors (9835056135).

12630556665 is a wasteful number, since it uses less digits than its factorization.

12630556665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47054 (or 47048 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 12630556665 in words is "twelve billion, six hundred thirty million, five hundred fifty-six thousand, six hundred sixty-five".