1606605151 has 4 divisors (see below), whose sum is σ = 1606963032. Its totient is φ = 1606247272.

The previous prime is 1606605149. The next prime is 1606605181. The reversal of 1606605151 is 1515066061.

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 1606605151 - 2¹ = 1606605149 is a prime.

It is a super-2 number, since 2×1606605151² = 5162360222439465602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606605181) 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, 172120 + ... + 181213.

It is an arithmetic number, because the mean of its divisors is an integer number (401740758).

Almost surely, 2^1606605151 is an apocalyptic number.

1606605151 is a deficient number, since it is larger than the sum of its proper divisors (357881).

1606605151 is an equidigital number, since it uses as much as digits as its factorization.

1606605151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357880.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1606605151 is about 40082.4793519563. The cubic root of 1606605151 is about 1171.2143504999.

The spelling of 1606605151 in words is "one billion, six hundred six million, six hundred five thousand, one hundred fifty-one".