6136889861 has 2 divisors, whose sum is σ = 6136889862. Its totient is φ = 6136889860.

The previous prime is 6136889833. The next prime is 6136889903. The reversal of 6136889861 is 1689886316.

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., 3918008836 + 2218881025 = 62594^2 + 47105^2 .

It is a cyclic number.

It is not a de Polignac number, because 6136889861 - 2²² = 6132695557 is a prime.

It is a super-2 number, since 2×6136889861² = 75322834332089198642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6136889797 and 6136889806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6136889761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3068444930 + 3068444931.

It is an arithmetic number, because the mean of its divisors is an integer number (3068444931).

Almost surely, 2^6136889861 is an apocalyptic number.

It is an amenable number.

6136889861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6136889861 is an equidigital number, since it uses as much as digits as its factorization.

6136889861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 56.

The square root of 6136889861 is about 78338.3039196024. The cubic root of 6136889861 is about 1830.8359982375.

The spelling of 6136889861 in words is "six billion, one hundred thirty-six million, eight hundred eighty-nine thousand, eight hundred sixty-one".