1620143365203 has 48 divisors (see below), whose sum is σ = 2624197934592. Its totient is φ = 954548712000.

The previous prime is 1620143365187. The next prime is 1620143365207. The reversal of 1620143365203 is 3025633410261.

1620143365203 is a `hidden beast` number, since 1 + 62 + 0 + 1 + 43 + 36 + 520 + 3 = 666.

It is not a de Polignac number, because 1620143365203 - 2⁴ = 1620143365187 is a prime.

It is a super-2 number, since 2×1620143365203² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620143365207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4100518 + ... + 4478228.

It is an arithmetic number, because the mean of its divisors is an integer number (54670790304).

Almost surely, 2^{1620143365203} is an apocalyptic number.

1620143365203 is a deficient number, since it is larger than the sum of its proper divisors (1004054569389).

1620143365203 is a wasteful number, since it uses less digits than its factorization.

1620143365203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378936 (or 378933 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 1620143365203 its reverse (3025633410261), we get a palindrome (4645776775464).

The spelling of 1620143365203 in words is "one trillion, six hundred twenty billion, one hundred forty-three million, three hundred sixty-five thousand, two hundred three".