1620203666732 has 24 divisors (see below), whose sum is σ = 3381294610176. Its totient is φ = 664182869328.

The previous prime is 1620203666717. The next prime is 1620203666737. The reversal of 1620203666732 is 2376663020261.

It is not an unprimeable number, because it can be changed into a prime (1620203666737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257921458 + ... + 1257922745.

It is an arithmetic number, because the mean of its divisors is an integer number (140887275424).

Almost surely, 2^{1620203666732} is an apocalyptic number.

It is an amenable number.

1620203666732 is an abundant number, since it is smaller than the sum of its proper divisors (1761090943444).

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

1620203666732 is a wasteful number, since it uses less digits than its factorization.

1620203666732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515844237 (or 2515844235 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 44.

Adding to 1620203666732 its reverse (2376663020261), we get a palindrome (3996866686993).

The spelling of 1620203666732 in words is "one trillion, six hundred twenty billion, two hundred three million, six hundred sixty-six thousand, seven hundred thirty-two".