2107978181244 has 144 divisors (see below), whose sum is σ = 5919809464800. Its totient is φ = 648395145216.

The previous prime is 2107978181209. The next prime is 2107978181251. The reversal of 2107978181244 is 4421818797012.

2107978181244 is a `hidden beast` number, since 210 + 7 + 9 + 7 + 8 + 181 + 244 = 666.

It is a super-2 number, since 2×2107978181244² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 47 ways as a sum of consecutive naturals, for example, 60743562 + ... + 60778254.

It is an arithmetic number, because the mean of its divisors is an integer number (41109787950).

Almost surely, 2^{2107978181244} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2107978181244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2959904732400).

2107978181244 is an abundant number, since it is smaller than the sum of its proper divisors (3811831283556).

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

2107978181244 is a wasteful number, since it uses less digits than its factorization.

2107978181244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38061 (or 38040 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 2107978181244 in words is "two trillion, one hundred seven billion, nine hundred seventy-eight million, one hundred eighty-one thousand, two hundred forty-four".