1802145380331 has 4 divisors (see below), whose sum is σ = 2402860507112. Its totient is φ = 1201430253552.

The previous prime is 1802145380327. The next prime is 1802145380353. The reversal of 1802145380331 is 1330835412081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1802145380331 - 2² = 1802145380327 is a prime.

It is a super-2 number, since 2×1802145380331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1802145380331.

It is not an unprimeable number, because it can be changed into a prime (1802145385331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300357563386 + ... + 300357563391.

It is an arithmetic number, because the mean of its divisors is an integer number (600715126778).

Almost surely, 2^{1802145380331} is an apocalyptic number.

1802145380331 is a deficient number, since it is larger than the sum of its proper divisors (600715126781).

1802145380331 is an equidigital number, since it uses as much as digits as its factorization.

1802145380331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600715126780.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 1802145380331 in words is "one trillion, eight hundred two billion, one hundred forty-five million, three hundred eighty thousand, three hundred thirty-one".