6151211861 has 2 divisors, whose sum is σ = 6151211862. Its totient is φ = 6151211860.

The previous prime is 6151211819. The next prime is 6151211863. The reversal of 6151211861 is 1681121516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6130107025 + 21104836 = 78295^2 + 4594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6151211861 is a prime.

Together with 6151211863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6151211863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3075605930 + 3075605931.

It is an arithmetic number, because the mean of its divisors is an integer number (3075605931).

Almost surely, 2^6151211861 is an apocalyptic number.

It is an amenable number.

6151211861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6151211861 is an equidigital number, since it uses as much as digits as its factorization.

6151211861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 32.

The square root of 6151211861 is about 78429.6618697289. The cubic root of 6151211861 is about 1832.2591328754.

The spelling of 6151211861 in words is "six billion, one hundred fifty-one million, two hundred eleven thousand, eight hundred sixty-one".