2164605644000 has 48 divisors (see below), whose sum is σ = 5318436077136. Its totient is φ = 865842256000.

The previous prime is 2164605643973. The next prime is 2164605644009. The reversal of 2164605644000 is 4465064612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164605644009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270571706 + ... + 270579705.

It is an arithmetic number, because the mean of its divisors is an integer number (110800751607).

Almost surely, 2^{2164605644000} is an apocalyptic number.

2164605644000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2164605644000 is an abundant number, since it is smaller than the sum of its proper divisors (3153830433136).

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

2164605644000 is an equidigital number, since it uses as much as digits as its factorization.

2164605644000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541151436 (or 541151418 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 2164605644000 in words is "two trillion, one hundred sixty-four billion, six hundred five million, six hundred forty-four thousand".