3912561481 has 2 divisors, whose sum is σ = 3912561482. Its totient is φ = 3912561480.

The previous prime is 3912561479. The next prime is 3912561503. The reversal of 3912561481 is 1841652193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3060855625 + 851705856 = 55325^2 + 29184^2 .

It is an emirp because it is prime and its reverse (1841652193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3912561481 - 2¹ = 3912561479 is a prime.

It is a super-2 number, since 2×3912561481² = 30616274685209826722, which contains 22 as substring.

Together with 3912561479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3912561451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956280740 + 1956280741.

It is an arithmetic number, because the mean of its divisors is an integer number (1956280741).

Almost surely, 2^3912561481 is an apocalyptic number.

It is an amenable number.

3912561481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3912561481 is an equidigital number, since it uses as much as digits as its factorization.

3912561481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 3912561481 is about 62550.4714690465. The cubic root of 3912561481 is about 1575.7490658448.

The spelling of 3912561481 in words is "three billion, nine hundred twelve million, five hundred sixty-one thousand, four hundred eighty-one".