210423687856144 has 135 divisors (see below), whose sum is σ = 475947954417117. Its totient is φ = 89861462366592.

The previous prime is 210423687856099. The next prime is 210423687856237. The reversal of 210423687856144 is 441658786324012.

The square root of 210423687856144 is 14505988.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 183706036592400 + 26717651263744 = 13553820^2 + 5168912^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 140940178662 + ... + 140940180154.

Almost surely, 2^{210423687856144} is an apocalyptic number.

210423687856144 is the 14505988-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210423687856144

210423687856144 is an abundant number, since it is smaller than the sum of its proper divisors (265524266560973).

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

210423687856144 is an frugal number, since it uses more digits than its factorization.

210423687856144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 1849 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 61.

The spelling of 210423687856144 in words is "two hundred ten trillion, four hundred twenty-three billion, six hundred eighty-seven million, eight hundred fifty-six thousand, one hundred forty-four".