61680481 has 2 divisors, whose sum is σ = 61680482. Its totient is φ = 61680480.

The previous prime is 61680467. The next prime is 61680527. The reversal of 61680481 is 18408616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 8317456 = 7305^2 + 2884^2 .

It is a cyclic number.

It is not a de Polignac number, because 61680481 - 2⁵ = 61680449 is a prime.

It is a super-2 number, since 2×61680481² = 7608963472782722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61680431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30840240 + 30840241.

It is an arithmetic number, because the mean of its divisors is an integer number (30840241).

Almost surely, 2^61680481 is an apocalyptic number.

It is an amenable number.

61680481 is a deficient number, since it is larger than the sum of its proper divisors (1).

61680481 is an equidigital number, since it uses as much as digits as its factorization.

61680481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 61680481 is about 7853.6921890280. The cubic root of 61680481 is about 395.1080855739.

The spelling of 61680481 in words is "sixty-one million, six hundred eighty thousand, four hundred eighty-one".