655640741 has 16 divisors (see below), whose sum is σ = 768514560. Its totient is φ = 547672320.

The previous prime is 655640719. The next prime is 655640743. The reversal of 655640741 is 147046556.

It is a cyclic number.

It is not a de Polignac number, because 655640741 - 2¹⁰ = 655639717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 655640695 and 655640704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655640743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75155 + ... + 83423.

It is an arithmetic number, because the mean of its divisors is an integer number (48032160).

Almost surely, 2^655640741 is an apocalyptic number.

It is an amenable number.

655640741 is a deficient number, since it is larger than the sum of its proper divisors (112873819).

655640741 is a wasteful number, since it uses less digits than its factorization.

655640741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8564.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 655640741 is about 25605.4826355607. The cubic root of 655640741 is about 868.7376509053.

The spelling of 655640741 in words is "six hundred fifty-five million, six hundred forty thousand, seven hundred forty-one".