4063211779081 has 81 divisors (see below), whose sum is σ = 5441098444821. Its totient is φ = 3023417988864.

The previous prime is 4063211779073. The next prime is 4063211779111. The reversal of 4063211779081 is 1809771123604.

The square root of 4063211779081 is 2015741.

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

It can be written as a sum of positive squares in 4 ways, for example, as 36687954681 + 4026523824400 = 191541^2 + 2006620^2 .

It is not a de Polignac number, because 4063211779081 - 2³ = 4063211779073 is a prime.

It is a super-2 number, since 2×4063211779081² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (4063211779481) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 3118350676 + ... + 3118351978.

Almost surely, 2^{4063211779081} is an apocalyptic number.

4063211779081 is the 2015741-st square number.

4063211779081 is the 1007871-st centered octagonal number.

It is an amenable number.

4063211779081 is a deficient number, since it is larger than the sum of its proper divisors (1377886665740).

4063211779081 is an equidigital number, since it uses as much as digits as its factorization.

4063211779081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 49.

Multiplying 4063211779081 by its sum of digits (49), we get a square (199097377174969 = 14110187²).

4063211779081 divided by its sum of digits (49) gives a square (82922689369 = 287963²).

The spelling of 4063211779081 in words is "four trillion, sixty-three billion, two hundred eleven million, seven hundred seventy-nine thousand, eighty-one".