6541178401 has 2 divisors, whose sum is σ = 6541178402. Its totient is φ = 6541178400.

The previous prime is 6541178381. The next prime is 6541178437. The reversal of 6541178401 is 1048711456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4332272400 + 2208906001 = 65820^2 + 46999^2 .

It is a cyclic number.

It is not a de Polignac number, because 6541178401 - 2¹¹ = 6541176353 is a prime.

It is not a weakly prime, because it can be changed into another prime (6541170401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270589200 + 3270589201.

It is an arithmetic number, because the mean of its divisors is an integer number (3270589201).

Almost surely, 2^6541178401 is an apocalyptic number.

It is an amenable number.

6541178401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6541178401 is an equidigital number, since it uses as much as digits as its factorization.

6541178401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 6541178401 is about 80877.5518979154. The cubic root of 6541178401 is about 1870.1882812510.

Adding to 6541178401 its reverse (1048711456), we get a palindrome (7589889857).

The spelling of 6541178401 in words is "six billion, five hundred forty-one million, one hundred seventy-eight thousand, four hundred one".