3820781721124 has 27 divisors (see below), whose sum is σ = 7056941103387. Its totient is φ = 1809808788888.

The previous prime is 3820781721121. The next prime is 3820781721139. The reversal of 3820781721124 is 4211271870283.

The square root of 3820781721124 is 1954682.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3820781721121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74252197 + ... + 74303635.

Almost surely, 2^{3820781721124} is an apocalyptic number.

3820781721124 is the 1954682-nd square number.

It is an amenable number.

3820781721124 is a deficient number, since it is larger than the sum of its proper divisors (3236159382263).

3820781721124 is an frugal number, since it uses more digits than its factorization.

3820781721124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102920 (or 51460 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 3820781721124 in words is "three trillion, eight hundred twenty billion, seven hundred eighty-one million, seven hundred twenty-one thousand, one hundred twenty-four".