61840481 has 4 divisors (see below), whose sum is σ = 62161092. Its totient is φ = 61519872.

The previous prime is 61840477. The next prime is 61840501. The reversal of 61840481 is 18404816.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7317025 + 54523456 = 2705^2 + 7384^2 .

It is a cyclic number.

It is not a de Polignac number, because 61840481 - 2² = 61840477 is a prime.

It is a super-2 number, since 2×61840481² = 7648490180622722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61840451) 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, 160016 + ... + 160401.

It is an arithmetic number, because the mean of its divisors is an integer number (15540273).

Almost surely, 2^61840481 is an apocalyptic number.

It is an amenable number.

61840481 is a deficient number, since it is larger than the sum of its proper divisors (320611).

61840481 is a wasteful number, since it uses less digits than its factorization.

61840481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320610.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 61840481 is about 7863.8718834935. The cubic root of 61840481 is about 395.4494291623.

The spelling of 61840481 in words is "sixty-one million, eight hundred forty thousand, four hundred eighty-one".