1606516501001 has 4 divisors (see below), whose sum is σ = 1606556511252. Its totient is φ = 1606476490752.

The previous prime is 1606516500989. The next prime is 1606516501019. The reversal of 1606516501001 is 1001056156061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 245199270976 + 1361317230025 = 495176^2 + 1166755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606516501001 - 2²⁶ = 1606449392137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606516501201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19944836 + ... + 20025221.

It is an arithmetic number, because the mean of its divisors is an integer number (401639127813).

Almost surely, 2^{1606516501001} is an apocalyptic number.

It is an amenable number.

1606516501001 is a deficient number, since it is larger than the sum of its proper divisors (40010251).

1606516501001 is an equidigital number, since it uses as much as digits as its factorization.

1606516501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40010250.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 1606516501001 in words is "one trillion, six hundred six billion, five hundred sixteen million, five hundred one thousand, one".