1820623280485 has 8 divisors (see below), whose sum is σ = 2184864426360. Its totient is φ = 1456420964544.

The previous prime is 1820623280453. The next prime is 1820623280543. The reversal of 1820623280485 is 5840823260281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 999102201601 + 821521078884 = 999551^2 + 906378^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1820623280485 - 2⁵ = 1820623280453 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9604230 + ... + 9791959.

It is an arithmetic number, because the mean of its divisors is an integer number (273108053295).

Almost surely, 2^{1820623280485} is an apocalyptic number.

It is an amenable number.

1820623280485 is a deficient number, since it is larger than the sum of its proper divisors (364241145875).

1820623280485 is a wasteful number, since it uses less digits than its factorization.

1820623280485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19414967.

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 1820623280485 in words is "one trillion, eight hundred twenty billion, six hundred twenty-three million, two hundred eighty thousand, four hundred eighty-five".