1831361726940 has 144 divisors (see below), whose sum is σ = 5368856156160. Its totient is φ = 465950620800.

The previous prime is 1831361726903. The next prime is 1831361726981. The reversal of 1831361726940 is 496271631381.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9278601 + ... + 9473919.

Almost surely, 2^{1831361726940} is an apocalyptic number.

1831361726940 is a gapful number since it is divisible by the number (10) 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 1831361726940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684428078080).

1831361726940 is an abundant number, since it is smaller than the sum of its proper divisors (3537494429220).

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

1831361726940 is a wasteful number, since it uses less digits than its factorization.

1831361726940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195504 (or 195431 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 1831361726940 in words is "one trillion, eight hundred thirty-one billion, three hundred sixty-one million, seven hundred twenty-six thousand, nine hundred forty".