2118681670368 has 48 divisors (see below), whose sum is σ = 5666474103696. Its totient is φ = 692902179840.

The previous prime is 2118681670351. The next prime is 2118681670387. The reversal of 2118681670368 is 8630761868112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208198693 + ... + 208208868.

It is an arithmetic number, because the mean of its divisors is an integer number (118051543827).

Almost surely, 2^{2118681670368} is an apocalyptic number.

It is an amenable number.

2118681670368 is an abundant number, since it is smaller than the sum of its proper divisors (3547792433328).

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

2118681670368 is a wasteful number, since it uses less digits than its factorization.

2118681670368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416407627 (or 416407619 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 2118681670368 in words is "two trillion, one hundred eighteen billion, six hundred eighty-one million, six hundred seventy thousand, three hundred sixty-eight".