1855153161 has 12 divisors (see below), whose sum is σ = 2716374388. Its totient is φ = 1219826304.

The previous prime is 1855153147. The next prime is 1855153189. The reversal of 1855153161 is 1613515581.

It is a happy number.

1855153161 is a `hidden beast` number, since 1 + 85 + 515 + 3 + 1 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1003622400 + 851530761 = 31680^2 + 29181^2 .

It is not a de Polignac number, because 1855153161 - 2¹⁹ = 1854628873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1855153061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411180 + ... + 1412493.

Almost surely, 2^1855153161 is an apocalyptic number.

It is an amenable number.

1855153161 is a deficient number, since it is larger than the sum of its proper divisors (861221227).

1855153161 is a wasteful number, since it uses less digits than its factorization.

1855153161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823752 (or 2823749 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

The square root of 1855153161 is about 43071.4889573137. The cubic root of 1855153161 is about 1228.7397939589.

The spelling of 1855153161 in words is "one billion, eight hundred fifty-five million, one hundred fifty-three thousand, one hundred sixty-one".