840641461 has 8 divisors (see below), whose sum is σ = 923220000. Its totient is φ = 759089040.

The previous prime is 840641447. The next prime is 840641489. The reversal of 840641461 is 164146048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840641461 - 2⁹ = 840640949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840641411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254811 + ... + 258088.

It is an arithmetic number, because the mean of its divisors is an integer number (115402500).

Almost surely, 2^840641461 is an apocalyptic number.

It is an amenable number.

840641461 is a deficient number, since it is larger than the sum of its proper divisors (82578539).

840641461 is a wasteful number, since it uses less digits than its factorization.

840641461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513059.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 840641461 is about 28993.8176341095. The cubic root of 840641461 is about 943.7789108814.

The spelling of 840641461 in words is "eight hundred forty million, six hundred forty-one thousand, four hundred sixty-one".