1685161151 has 2 divisors, whose sum is σ = 1685161152. Its totient is φ = 1685161150.

The previous prime is 1685161141. The next prime is 1685161157. The reversal of 1685161151 is 1511615861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1685161151 - 2²⁶ = 1618052287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685161157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842580575 + 842580576.

It is an arithmetic number, because the mean of its divisors is an integer number (842580576).

Almost surely, 2^1685161151 is an apocalyptic number.

1685161151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685161151 is an equidigital number, since it uses as much as digits as its factorization.

1685161151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 35.

The square root of 1685161151 is about 41050.7143786804. The cubic root of 1685161151 is about 1190.0005063200. Note that the first 3 decimals are identical.

The spelling of 1685161151 in words is "one billion, six hundred eighty-five million, one hundred sixty-one thousand, one hundred fifty-one".