1803925823217 has 16 divisors (see below), whose sum is σ = 2749045882752. Its totient is φ = 1030737306240.

The previous prime is 1803925823209. The next prime is 1803925823299. The reversal of 1803925823217 is 7123285293081.

It is not a de Polignac number, because 1803925823217 - 2³ = 1803925823209 is a prime.

It is a super-2 number, since 2×1803925823217² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1803925823217.

It is not an unprimeable number, because it can be changed into a prime (1803925823017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2940334 + ... + 3500487.

It is an arithmetic number, because the mean of its divisors is an integer number (171815367672).

Almost surely, 2^{1803925823217} is an apocalyptic number.

It is an amenable number.

1803925823217 is a deficient number, since it is larger than the sum of its proper divisors (945120059535).

1803925823217 is a wasteful number, since it uses less digits than its factorization.

1803925823217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454168.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 1803925823217 in words is "one trillion, eight hundred three billion, nine hundred twenty-five million, eight hundred twenty-three thousand, two hundred seventeen".