11805940297840 has 160 divisors (see below), whose sum is σ = 31163487659136. Its totient is φ = 4126603345920.

The previous prime is 11805940297819. The next prime is 11805940297913. The reversal of 11805940297840 is 4879204950811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223881 + ... + 4864360.

Almost surely, 2^{11805940297840} is an apocalyptic number.

11805940297840 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 11805940297840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15581743829568).

11805940297840 is an abundant number, since it is smaller than the sum of its proper divisors (19357547361296).

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

11805940297840 is a wasteful number, since it uses less digits than its factorization.

11805940297840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088387 (or 5088381 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 11805940297840 in words is "eleven trillion, eight hundred five billion, nine hundred forty million, two hundred ninety-seven thousand, eight hundred forty".