4071551681 has 2 divisors, whose sum is σ = 4071551682. Its totient is φ = 4071551680.

The previous prime is 4071551651. The next prime is 4071551711. The reversal of 4071551681 is 1861551704.

It is a balanced prime because it is at equal distance from previous prime (4071551651) and next prime (4071551711).

It can be written as a sum of positive squares in only one way, i.e., 3941956225 + 129595456 = 62785^2 + 11384^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4071551681 is a prime.

It is a super-2 number, since 2×4071551681² = 33155066182107851522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4071551641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2035775840 + 2035775841.

It is an arithmetic number, because the mean of its divisors is an integer number (2035775841).

Almost surely, 2^4071551681 is an apocalyptic number.

It is an amenable number.

4071551681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4071551681 is an equidigital number, since it uses as much as digits as its factorization.

4071551681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 38.

The square root of 4071551681 is about 63808.7116387723. The cubic root of 4071551681 is about 1596.8102703715.

The spelling of 4071551681 in words is "four billion, seventy-one million, five hundred fifty-one thousand, six hundred eighty-one".