840460268447 has 2 divisors, whose sum is σ = 840460268448. Its totient is φ = 840460268446.

The previous prime is 840460268441. The next prime is 840460268471. The reversal of 840460268447 is 744862064048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840460268447 - 2¹² = 840460264351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840460268441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420230134223 + 420230134224.

It is an arithmetic number, because the mean of its divisors is an integer number (420230134224).

Almost surely, 2^840460268447 is an apocalyptic number.

840460268447 is a deficient number, since it is larger than the sum of its proper divisors (1).

840460268447 is an equidigital number, since it uses as much as digits as its factorization.

840460268447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8257536, while the sum is 53.

The spelling of 840460268447 in words is "eight hundred forty billion, four hundred sixty million, two hundred sixty-eight thousand, four hundred forty-seven".