1800255311136 has 72 divisors (see below), whose sum is σ = 5120724720384. Its totient is φ = 599938738560.

The previous prime is 1800255311119. The next prime is 1800255311137. The reversal of 1800255311136 is 6311135520081.

It is a happy number.

1800255311136 is a `hidden beast` number, since 1 + 8 + 0 + 0 + 2 + 5 + 531 + 113 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×1800255311136² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1800255311136.

It is not an unprimeable number, because it can be changed into a prime (1800255311137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423705 + ... + 1944231.

It is an arithmetic number, because the mean of its divisors is an integer number (71121176672).

Almost surely, 2^{1800255311136} is an apocalyptic number.

1800255311136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1800255311136 is an abundant number, since it is smaller than the sum of its proper divisors (3320469409248).

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

1800255311136 is a wasteful number, since it uses less digits than its factorization.

1800255311136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524654 (or 1524643 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 1800255311136 in words is "one trillion, eight hundred billion, two hundred fifty-five million, three hundred eleven thousand, one hundred thirty-six".