61818011 has 2 divisors, whose sum is σ = 61818012. Its totient is φ = 61818010.

The previous prime is 61818007. The next prime is 61818059. The reversal of 61818011 is 11081816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61818011 - 2² = 61818007 is a prime.

It is a super-2 number, since 2×61818011² = 7642932967992242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61818811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30909005 + 30909006.

It is an arithmetic number, because the mean of its divisors is an integer number (30909006).

Almost surely, 2^61818011 is an apocalyptic number.

61818011 is a deficient number, since it is larger than the sum of its proper divisors (1).

61818011 is an equidigital number, since it uses as much as digits as its factorization.

61818011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 26.

The square root of 61818011 is about 7862.4430681564. The cubic root of 61818011 is about 395.4015272865.

Adding to 61818011 its reverse (11081816), we get a palindrome (72899827).

The spelling of 61818011 in words is "sixty-one million, eight hundred eighteen thousand, eleven".