5994421681 has 2 divisors, whose sum is σ = 5994421682. Its totient is φ = 5994421680.

The previous prime is 5994421651. The next prime is 5994421721. The reversal of 5994421681 is 1861244995.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5910534400 + 83887281 = 76880^2 + 9159^2 .

It is a cyclic number.

It is not a de Polignac number, because 5994421681 - 2⁵ = 5994421649 is a prime.

It is a super-2 number, since 2×5994421681² = 71866182579285731522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5994421651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2997210840 + 2997210841.

It is an arithmetic number, because the mean of its divisors is an integer number (2997210841).

Almost surely, 2^5994421681 is an apocalyptic number.

It is an amenable number.

5994421681 is a deficient number, since it is larger than the sum of its proper divisors (1).

5994421681 is an equidigital number, since it uses as much as digits as its factorization.

5994421681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 49.

The square root of 5994421681 is about 77423.6506566308. The cubic root of 5994421681 is about 1816.5572805369.

The spelling of 5994421681 in words is "five billion, nine hundred ninety-four million, four hundred twenty-one thousand, six hundred eighty-one".