61600063 has 4 divisors (see below), whose sum is σ = 70400080. Its totient is φ = 52800048.

The previous prime is 61600039. The next prime is 61600067. The reversal of 61600063 is 36000616.

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

It is a de Polignac number, because none of the positive numbers 2^k-61600063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61600067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4399998 + ... + 4400011.

It is an arithmetic number, because the mean of its divisors is an integer number (17600020).

Almost surely, 2^61600063 is an apocalyptic number.

61600063 is a deficient number, since it is larger than the sum of its proper divisors (8800017).

61600063 is an equidigital number, since it uses as much as digits as its factorization.

61600063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800016.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 61600063 is about 7848.5707616100. The cubic root of 61600063 is about 394.9362990798.

Adding to 61600063 its reverse (36000616), we get a palindrome (97600679).

The spelling of 61600063 in words is "sixty-one million, six hundred thousand, sixty-three".