61678481 has 8 divisors (see below), whose sum is σ = 62814528. Its totient is φ = 60550000.

The previous prime is 61678459. The next prime is 61678483. The reversal of 61678481 is 18487616.

61678481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 61678481 - 2¹⁰ = 61677457 is a prime.

It is a super-2 number, since 2×61678481² = 7608470036934722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61678483) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16091 + ... + 19551.

It is an arithmetic number, because the mean of its divisors is an integer number (7851816).

Almost surely, 2^61678481 is an apocalyptic number.

It is an amenable number.

61678481 is a deficient number, since it is larger than the sum of its proper divisors (1136047).

61678481 is a wasteful number, since it uses less digits than its factorization.

61678481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783.

The product of its digits is 64512, while the sum is 41.

The square root of 61678481 is about 7853.5648593489. The cubic root of 61678481 is about 395.1038150456.

It can be divided in two parts, 616 and 78481, that added together give a palindrome (79097).

The spelling of 61678481 in words is "sixty-one million, six hundred seventy-eight thousand, four hundred eighty-one".