840266475379 has 2 divisors, whose sum is σ = 840266475380. Its totient is φ = 840266475378.

The previous prime is 840266475337. The next prime is 840266475401. The reversal of 840266475379 is 973574662048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840266475379 - 2¹⁵ = 840266442611 is a prime.

It is a super-2 number, since 2×840266475379² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (840266475679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420133237689 + 420133237690.

It is an arithmetic number, because the mean of its divisors is an integer number (420133237690).

Almost surely, 2^840266475379 is an apocalyptic number.

840266475379 is a deficient number, since it is larger than the sum of its proper divisors (1).

840266475379 is an equidigital number, since it uses as much as digits as its factorization.

840266475379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 61.

The spelling of 840266475379 in words is "eight hundred forty billion, two hundred sixty-six million, four hundred seventy-five thousand, three hundred seventy-nine".