60681581 has 4 divisors (see below), whose sum is σ = 60698112. Its totient is φ = 60665052.

The previous prime is 60681571. The next prime is 60681583. The reversal of 60681581 is 18518606.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18518606 = 2 ⋅9259303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60681581 is a prime.

It is a super-2 number, since 2×60681581² = 7364508545319122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60681583) 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, 11 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (15174528).

Almost surely, 2^60681581 is an apocalyptic number.

It is an amenable number.

60681581 is a deficient number, since it is larger than the sum of its proper divisors (16531).

60681581 is a wasteful number, since it uses less digits than its factorization.

60681581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16530.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 60681581 is about 7789.8383166790. The cubic root of 60681581 is about 392.9635746767.

The spelling of 60681581 in words is "sixty million, six hundred eighty-one thousand, five hundred eighty-one".