3621425881 has 2 divisors, whose sum is σ = 3621425882. Its totient is φ = 3621425880.

The previous prime is 3621425879. The next prime is 3621425893. The reversal of 3621425881 is 1885241263.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3610928281 + 10497600 = 60091^2 + 3240^2 .

It is a cyclic number.

It is not a de Polignac number, because 3621425881 - 2¹ = 3621425879 is a prime.

It is a super-2 number, since 2×3621425881² = 26229450823153252322, which contains 22 as substring.

Together with 3621425879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3621425851) by changing a digit.

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 as a sum of consecutive naturals, namely, 1810712940 + 1810712941.

It is an arithmetic number, because the mean of its divisors is an integer number (1810712941).

Almost surely, 2^3621425881 is an apocalyptic number.

It is an amenable number.

3621425881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3621425881 is an equidigital number, since it uses as much as digits as its factorization.

3621425881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 40.

The square root of 3621425881 is about 60178.2841314041. The cubic root of 3621425881 is about 1535.6533812651.

The spelling of 3621425881 in words is "three billion, six hundred twenty-one million, four hundred twenty-five thousand, eight hundred eighty-one".