1620245533443 has 4 divisors (see below), whose sum is σ = 2160327377928. Its totient is φ = 1080163688960.

The previous prime is 1620245533411. The next prime is 1620245533499. The reversal of 1620245533443 is 3443355420261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620245533443 - 2⁵ = 1620245533411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620245533395 and 1620245533404.

It is not an unprimeable number, because it can be changed into a prime (1620245533043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270040922238 + ... + 270040922243.

It is an arithmetic number, because the mean of its divisors is an integer number (540081844482).

Almost surely, 2^{1620245533443} is an apocalyptic number.

1620245533443 is a deficient number, since it is larger than the sum of its proper divisors (540081844485).

1620245533443 is an equidigital number, since it uses as much as digits as its factorization.

1620245533443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540081844484.

The product of its (nonzero) digits is 1036800, while the sum is 42.

The spelling of 1620245533443 in words is "one trillion, six hundred twenty billion, two hundred forty-five million, five hundred thirty-three thousand, four hundred forty-three".