1811811007125 has 384 divisors, whose sum is σ = 4036770017280. Its totient is φ = 793237536000.

The previous prime is 1811811007117. The next prime is 1811811007163. The reversal of 1811811007125 is 5217001181181.

It is not a de Polignac number, because 1811811007125 - 2³ = 1811811007117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1811811007125.

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 383 ways as a sum of consecutive naturals, for example, 807761254 + ... + 807763496.

It is an arithmetic number, because the mean of its divisors is an integer number (10512421920).

Almost surely, 2^{1811811007125} is an apocalyptic number.

1811811007125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1811811007125 is an abundant number, since it is smaller than the sum of its proper divisors (2224959010155).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811811007125 is a wasteful number, since it uses less digits than its factorization.

1811811007125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 36.

The spelling of 1811811007125 in words is "one trillion, eight hundred eleven billion, eight hundred eleven million, seven thousand, one hundred twenty-five".