2721018396672 has 300 divisors, whose sum is σ = 8144347947120. Its totient is φ = 905318498304.

The previous prime is 2721018396589. The next prime is 2721018396673. The reversal of 2721018396672 is 2766938101272.

It is a happy number.

2721018396672 is a `hidden beast` number, since 27 + 210 + 18 + 396 + 6 + 7 + 2 = 666.

It is a super-2 number, since 2×2721018396672² (a number of 26 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 not an unprimeable number, because it can be changed into a prime (2721018396673) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 858634704 + ... + 858637872.

Almost surely, 2^{2721018396672} 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 2721018396672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4072173973560).

2721018396672 is an abundant number, since it is smaller than the sum of its proper divisors (5423329550448).

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

2721018396672 is an frugal number, since it uses more digits than its factorization.

2721018396672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 3821 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 2721018396672 in words is "two trillion, seven hundred twenty-one billion, eighteen million, three hundred ninety-six thousand, six hundred seventy-two".