61868 has 6 divisors (see below), whose sum is σ = 108276. Its totient is φ = 30932.

The previous prime is 61861. The next prime is 61871. The reversal of 61868 is 86816.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 61868.

It is not an unprimeable number, because it can be changed into a prime (61861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7730 + ... + 7737.

It is an arithmetic number, because the mean of its divisors is an integer number (18046).

2⁶¹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

61868 is a deficient number, since it is larger than the sum of its proper divisors (46408).

61868 is a wasteful number, since it uses less digits than its factorization.

61868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15471 (or 15469 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 61868 is about 248.7327883493. The cubic root of 61868 is about 39.5508078766.

It can be divided in two parts, 618 and 68, that multiplied together give a palindrome (42024).

The spelling of 61868 in words is "sixty-one thousand, eight hundred sixty-eight".