1606917842461 has 4 divisors (see below), whose sum is σ = 1610403564924. Its totient is φ = 1603432120000.

The previous prime is 1606917842447. The next prime is 1606917842479. The reversal of 1606917842461 is 1642487196061.

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 1207759238361 + 399158604100 = 1098981^2 + 631790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606917842461 - 2¹⁷ = 1606917711389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606917842561) 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, 1742860540 + ... + 1742861461.

It is an arithmetic number, because the mean of its divisors is an integer number (402600891231).

Almost surely, 2^{1606917842461} is an apocalyptic number.

It is an amenable number.

1606917842461 is a deficient number, since it is larger than the sum of its proper divisors (3485722463).

1606917842461 is an equidigital number, since it uses as much as digits as its factorization.

1606917842461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485722462.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1606917842461 in words is "one trillion, six hundred six billion, nine hundred seventeen million, eight hundred forty-two thousand, four hundred sixty-one".