6254156681 has 2 divisors, whose sum is σ = 6254156682. Its totient is φ = 6254156680.

The previous prime is 6254156663. The next prime is 6254156693. The reversal of 6254156681 is 1866514526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6052062025 + 202094656 = 77795^2 + 14216^2 .

It is a cyclic number.

It is not a de Polignac number, because 6254156681 - 2³⁰ = 5180414857 is a prime.

It is a super-2 number, since 2×6254156681² = 78228951580993871522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6254156611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3127078340 + 3127078341.

It is an arithmetic number, because the mean of its divisors is an integer number (3127078341).

Almost surely, 2^6254156681 is an apocalyptic number.

It is an amenable number.

6254156681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6254156681 is an equidigital number, since it uses as much as digits as its factorization.

6254156681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 6254156681 is about 79083.2262935700. The cubic root of 6254156681 is about 1842.4240146583.

The spelling of 6254156681 in words is "six billion, two hundred fifty-four million, one hundred fifty-six thousand, six hundred eighty-one".