2145211642720 has 48 divisors (see below), whose sum is σ = 5366183836608. Its totient is φ = 807609088000.

The previous prime is 2145211642709. The next prime is 2145211642741. The reversal of 2145211642720 is 272461125412.

It is a super-2 number, since 2×2145211642720² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2145211642720.

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 7 ways as a sum of consecutive naturals, for example, 394337656 + ... + 394343095.

It is an arithmetic number, because the mean of its divisors is an integer number (111795496596).

Almost surely, 2^{2145211642720} is an apocalyptic number.

2145211642720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145211642720 is an abundant number, since it is smaller than the sum of its proper divisors (3220972193888).

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

2145211642720 is a wasteful number, since it uses less digits than its factorization.

2145211642720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788680783 (or 788680775 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 2145211642720 in words is "two trillion, one hundred forty-five billion, two hundred eleven million, six hundred forty-two thousand, seven hundred twenty".