1830618728969 has 4 divisors (see below), whose sum is σ = 1830879545040. Its totient is φ = 1830357912900.

The previous prime is 1830618728947. The next prime is 1830618728993. The reversal of 1830618728969 is 9698278160381.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1830618728969 is a prime.

It is a super-2 number, since 2×1830618728969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1830618728899 and 1830618728908.

It is not an unprimeable number, because it can be changed into a prime (1830618728569) 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, 130397507 + ... + 130411544.

It is an arithmetic number, because the mean of its divisors is an integer number (457719886260).

Almost surely, 2^{1830618728969} is an apocalyptic number.

It is an amenable number.

1830618728969 is a deficient number, since it is larger than the sum of its proper divisors (260816071).

1830618728969 is an equidigital number, since it uses as much as digits as its factorization.

1830618728969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260816070.

The product of its (nonzero) digits is 62705664, while the sum is 68.

The spelling of 1830618728969 in words is "one trillion, eight hundred thirty billion, six hundred eighteen million, seven hundred twenty-eight thousand, nine hundred sixty-nine".