6261542161 has 16 divisors (see below), whose sum is σ = 7475908608. Its totient is φ = 5131314000.

The previous prime is 6261542141. The next prime is 6261542173. The reversal of 6261542161 is 1612451626.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6261542161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6261542141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155815 + ... + 191836.

It is an arithmetic number, because the mean of its divisors is an integer number (467244288).

Almost surely, 2^6261542161 is an apocalyptic number.

It is an amenable number.

6261542161 is a deficient number, since it is larger than the sum of its proper divisors (1214366447).

6261542161 is a wasteful number, since it uses less digits than its factorization.

6261542161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347772.

The product of its digits is 17280, while the sum is 34.

The square root of 6261542161 is about 79129.9068683895. The cubic root of 6261542161 is about 1843.1489636116.

Adding to 6261542161 its reverse (1612451626), we get a palindrome (7873993787).

The spelling of 6261542161 in words is "six billion, two hundred sixty-one million, five hundred forty-two thousand, one hundred sixty-one".