3619365881 has 2 divisors, whose sum is σ = 3619365882. Its totient is φ = 3619365880.

The previous prime is 3619365877. The next prime is 3619365901. The reversal of 3619365881 is 1885639163.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2881971856 + 737394025 = 53684^2 + 27155^2 .

It is a cyclic number.

It is not a de Polignac number, because 3619365881 - 2² = 3619365877 is a prime.

It is a super-2 number, since 2×3619365881² = 26199618761093812322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3619365481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1809682940 + 1809682941.

It is an arithmetic number, because the mean of its divisors is an integer number (1809682941).

Almost surely, 2^3619365881 is an apocalyptic number.

It is an amenable number.

3619365881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3619365881 is an equidigital number, since it uses as much as digits as its factorization.

3619365881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 3619365881 is about 60161.1658879713. The cubic root of 3619365881 is about 1535.3621473619.

The spelling of 3619365881 in words is "three billion, six hundred nineteen million, three hundred sixty-five thousand, eight hundred eighty-one".