1620663325003 has 8 divisors (see below), whose sum is σ = 1705976029520. Its totient is φ = 1535352084000.

The previous prime is 1620663324997. The next prime is 1620663325013. The reversal of 1620663325003 is 3005233660261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620663325003 is a prime.

It is a super-2 number, since 2×1620663325003² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620663325013) by changing a digit.

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, 2471401 + ... + 3057637.

It is an arithmetic number, because the mean of its divisors is an integer number (213247003690).

Almost surely, 2^{1620663325003} is an apocalyptic number.

1620663325003 is a deficient number, since it is larger than the sum of its proper divisors (85312704517).

1620663325003 is a wasteful number, since it uses less digits than its factorization.

1620663325003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731757.

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 1620663325003 its reverse (3005233660261), we get a palindrome (4625896985264).

The spelling of 1620663325003 in words is "one trillion, six hundred twenty billion, six hundred sixty-three million, three hundred twenty-five thousand, three".