1815010161 has 8 divisors (see below), whose sum is σ = 2432684544. Its totient is φ = 1203671280.

The previous prime is 1815010159. The next prime is 1815010187. The reversal of 1815010161 is 1610105181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1815010161 - 2¹ = 1815010159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1815010061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583206 + ... + 1584351.

It is an arithmetic number, because the mean of its divisors is an integer number (304085568).

Almost surely, 2^1815010161 is an apocalyptic number.

It is an amenable number.

1815010161 is a deficient number, since it is larger than the sum of its proper divisors (617674383).

1815010161 is a wasteful number, since it uses less digits than its factorization.

1815010161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167751.

The product of its (nonzero) digits is 240, while the sum is 24.

The square root of 1815010161 is about 42602.9360607928. The cubic root of 1815010161 is about 1219.8123336259.

The spelling of 1815010161 in words is "one billion, eight hundred fifteen million, ten thousand, one hundred sixty-one".