406881377291 has 2 divisors, whose sum is σ = 406881377292. Its totient is φ = 406881377290.

The previous prime is 406881377269. The next prime is 406881377303. The reversal of 406881377291 is 192773188604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406881377291 is a prime.

It is not a weakly prime, because it can be changed into another prime (406889377291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203440688645 + 203440688646.

It is an arithmetic number, because the mean of its divisors is an integer number (203440688646).

Almost surely, 2^406881377291 is an apocalyptic number.

406881377291 is a deficient number, since it is larger than the sum of its proper divisors (1).

406881377291 is an equidigital number, since it uses as much as digits as its factorization.

406881377291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 406881377291 in words is "four hundred six billion, eight hundred eighty-one million, three hundred seventy-seven thousand, two hundred ninety-one".