405868868579 has 2 divisors, whose sum is σ = 405868868580. Its totient is φ = 405868868578.

The previous prime is 405868868533. The next prime is 405868868591. The reversal of 405868868579 is 975868868504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405868868579 is a prime.

It is not a weakly prime, because it can be changed into another prime (405868868179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202934434289 + 202934434290.

It is an arithmetic number, because the mean of its divisors is an integer number (202934434290).

Almost surely, 2^405868868579 is an apocalyptic number.

405868868579 is a deficient number, since it is larger than the sum of its proper divisors (1).

405868868579 is an equidigital number, since it uses as much as digits as its factorization.

405868868579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 928972800, while the sum is 74.

The spelling of 405868868579 in words is "four hundred five billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, five hundred seventy-nine".