62581681 has 4 divisors (see below), whose sum is σ = 64739700. Its totient is φ = 60423664.

The previous prime is 62581679. The next prime is 62581691. The reversal of 62581681 is 18618526.

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 19219456 + 43362225 = 4384^2 + 6585^2 .

It is a cyclic number.

It is not a de Polignac number, because 62581681 - 2¹ = 62581679 is a prime.

It is a super-2 number, since 2×62581681² = 7832933593571522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 62581681.

It is not an unprimeable number, because it can be changed into a prime (62581661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1078966 + ... + 1079023.

It is an arithmetic number, because the mean of its divisors is an integer number (16184925).

Almost surely, 2^62581681 is an apocalyptic number.

It is an amenable number.

62581681 is a deficient number, since it is larger than the sum of its proper divisors (2158019).

62581681 is a wasteful number, since it uses less digits than its factorization.

62581681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158018.

The product of its digits is 23040, while the sum is 37.

The square root of 62581681 is about 7910.8584237110. The cubic root of 62581681 is about 397.0230684081.

The spelling of 62581681 in words is "sixty-two million, five hundred eighty-one thousand, six hundred eighty-one".