1805390426112 has 832 divisors, whose sum is σ = 6191999686656. Its totient is φ = 455155384320.

The previous prime is 1805390426051. The next prime is 1805390426113. The reversal of 1805390426112 is 2116240935081.

It is a tau number, because it is divible by the number of its divisors (832).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1805390426113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2429865613 + ... + 2429866355.

Almost surely, 2^{1805390426112} is an apocalyptic number.

1805390426112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805390426112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3095999843328).

1805390426112 is an abundant number, since it is smaller than the sum of its proper divisors (4386609260544).

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

1805390426112 is a wasteful number, since it uses less digits than its factorization.

1805390426112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 1805390426112 in words is "one trillion, eight hundred five billion, three hundred ninety million, four hundred twenty-six thousand, one hundred twelve".