61450681 has 8 divisors (see below), whose sum is σ = 63748800. Its totient is φ = 59164560.

The previous prime is 61450679. The next prime is 61450709. The reversal of 61450681 is 18605416.

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 61450681 - 2¹ = 61450679 is a prime.

It is a super-2 number, since 2×61450681² = 7552372390727522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61450651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8196 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (7968600).

Almost surely, 2^61450681 is an apocalyptic number.

It is an amenable number.

61450681 is a deficient number, since it is larger than the sum of its proper divisors (2298119).

61450681 is a wasteful number, since it uses less digits than its factorization.

61450681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 61450681 is about 7839.0484754210. The cubic root of 61450681 is about 394.6167965499.

The spelling of 61450681 in words is "sixty-one million, four hundred fifty thousand, six hundred eighty-one".