61816135 has 4 divisors (see below), whose sum is σ = 74179368. Its totient is φ = 49452904.

The previous prime is 61816133. The next prime is 61816207. The reversal of 61816135 is 53161816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61816135 - 2¹ = 61816133 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61816097 and 61816106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61816133) 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 3 ways as a sum of consecutive naturals, for example, 6181609 + ... + 6181618.

It is an arithmetic number, because the mean of its divisors is an integer number (18544842).

Almost surely, 2^61816135 is an apocalyptic number.

61816135 is a deficient number, since it is larger than the sum of its proper divisors (12363233).

61816135 is a wasteful number, since it uses less digits than its factorization.

61816135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12363232.

The product of its digits is 4320, while the sum is 31.

The square root of 61816135 is about 7862.3237659104. The cubic root of 61816135 is about 395.3975274772.

The spelling of 61816135 in words is "sixty-one million, eight hundred sixteen thousand, one hundred thirty-five".