1814425961 has 4 divisors (see below), whose sum is σ = 1815245124. Its totient is φ = 1813606800.

The previous prime is 1814425927. The next prime is 1814425967. The reversal of 1814425961 is 1695244181.

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 1071318361 + 743107600 = 32731^2 + 27260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1814425961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1814425967) 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, 406250 + ... + 410691.

It is an arithmetic number, because the mean of its divisors is an integer number (453811281).

Almost surely, 2^1814425961 is an apocalyptic number.

It is an amenable number.

1814425961 is a deficient number, since it is larger than the sum of its proper divisors (819163).

1814425961 is an equidigital number, since it uses as much as digits as its factorization.

1814425961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819162.

The product of its digits is 69120, while the sum is 41.

The square root of 1814425961 is about 42596.0791740273. The cubic root of 1814425961 is about 1219.6814453163.

The spelling of 1814425961 in words is "one billion, eight hundred fourteen million, four hundred twenty-five thousand, nine hundred sixty-one".