840280940741 has 4 divisors (see below), whose sum is σ = 916670117184. Its totient is φ = 763891764300.

The previous prime is 840280940713. The next prime is 840280940747. The reversal of 840280940741 is 147049082048.

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.

It is a cyclic number.

It is not a de Polignac number, because 840280940741 - 2²² = 840276746437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840280940747) 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, 38194588205 + ... + 38194588226.

It is an arithmetic number, because the mean of its divisors is an integer number (229167529296).

Almost surely, 2^840280940741 is an apocalyptic number.

It is an amenable number.

840280940741 is a deficient number, since it is larger than the sum of its proper divisors (76389176443).

840280940741 is a wasteful number, since it uses less digits than its factorization.

840280940741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76389176442.

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 840280940741 in words is "eight hundred forty billion, two hundred eighty million, nine hundred forty thousand, seven hundred forty-one".