2123811456736 has 12 divisors (see below), whose sum is σ = 4181253805512. Its totient is φ = 1061905728352.

The previous prime is 2123811456731. The next prime is 2123811456743. The reversal of 2123811456736 is 6376541183212.

It is a self number, because there is not a number n which added to its sum of digits gives 2123811456736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123811456731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33184553980 + ... + 33184554043.

It is an arithmetic number, because the mean of its divisors is an integer number (348437817126).

Almost surely, 2^{2123811456736} is an apocalyptic number.

It is an amenable number.

2123811456736 is a deficient number, since it is larger than the sum of its proper divisors (2057442348776).

2123811456736 is an equidigital number, since it uses as much as digits as its factorization.

2123811456736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66369108033 (or 66369108025 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 2123811456736 in words is "two trillion, one hundred twenty-three billion, eight hundred eleven million, four hundred fifty-six thousand, seven hundred thirty-six".