61616013 has 8 divisors (see below), whose sum is σ = 83902848. Its totient is φ = 40203264.

The previous prime is 61615999. The next prime is 61616017. The reversal of 61616013 is 31061616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61616013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218356 + ... + 218637.

It is an arithmetic number, because the mean of its divisors is an integer number (10487856).

Almost surely, 2^61616013 is an apocalyptic number.

It is an amenable number.

61616013 is a deficient number, since it is larger than the sum of its proper divisors (22286835).

61616013 is a wasteful number, since it uses less digits than its factorization.

61616013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437043.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 61616013 is about 7849.5868044121. The cubic root of 61616013 is about 394.9703828672.

Adding to 61616013 its reverse (31061616), we get a palindrome (92677629).

The spelling of 61616013 in words is "sixty-one million, six hundred sixteen thousand, thirteen".