60644681 has 4 divisors (see below), whose sum is σ = 60785172. Its totient is φ = 60504192.

The previous prime is 60644669. The next prime is 60644687. The reversal of 60644681 is 18644606.

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 5216656 + 55428025 = 2284^2 + 7445^2 .

It is a cyclic number.

It is not a de Polignac number, because 60644681 - 2¹⁸ = 60382537 is a prime.

It is a super-2 number, since 2×60644681² = 7355554667183522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60644687) 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, 69596 + ... + 70461.

It is an arithmetic number, because the mean of its divisors is an integer number (15196293).

Almost surely, 2^60644681 is an apocalyptic number.

It is an amenable number.

60644681 is a deficient number, since it is larger than the sum of its proper divisors (140491).

60644681 is a wasteful number, since it uses less digits than its factorization.

60644681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140490.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 60644681 is about 7787.4694862966. The cubic root of 60644681 is about 392.8839058226.

The spelling of 60644681 in words is "sixty million, six hundred forty-four thousand, six hundred eighty-one".