61868655 has 36 divisors (see below), whose sum is σ = 113304360. Its totient is φ = 31143744.

The previous prime is 61868641. The next prime is 61868663. The reversal of 61868655 is 55686816.

61868655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61868655 - 2⁸ = 61868399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61868655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 229861 + ... + 230129.

Almost surely, 2^61868655 is an apocalyptic number.

61868655 is a deficient number, since it is larger than the sum of its proper divisors (51435705).

61868655 is a wasteful number, since it uses less digits than its factorization.

61868655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568 (or 296 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 61868655 is about 7865.6630362608. The cubic root of 61868655 is about 395.5094745160.

It can be divided in two parts, 6186 and 8655, that added together give a palindrome (14841).

The spelling of 61868655 in words is "sixty-one million, eight hundred sixty-eight thousand, six hundred fifty-five".