1620617812075 has 6 divisors (see below), whose sum is σ = 2009566087004. Its totient is φ = 1296494249640.

The previous prime is 1620617812063. The next prime is 1620617812139. The reversal of 1620617812075 is 5702187160261.

It is not a de Polignac number, because 1620617812075 - 2¹⁵ = 1620617779307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32412356217 + ... + 32412356266.

Almost surely, 2^{1620617812075} is an apocalyptic number.

1620617812075 is a deficient number, since it is larger than the sum of its proper divisors (388948274929).

1620617812075 is an equidigital number, since it uses as much as digits as its factorization.

1620617812075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64824712493 (or 64824712488 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 1620617812075 in words is "one trillion, six hundred twenty billion, six hundred seventeen million, eight hundred twelve thousand, seventy-five".