401234256664867 has 2 divisors, whose sum is σ = 401234256664868. Its totient is φ = 401234256664866.

The previous prime is 401234256664859. The next prime is 401234256664873. The reversal of 401234256664867 is 768466652432104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401234256664867 - 2³ = 401234256664859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 401234256664799 and 401234256664808.

It is not a weakly prime, because it can be changed into another prime (401234256664807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200617128332433 + 200617128332434.

It is an arithmetic number, because the mean of its divisors is an integer number (200617128332434).

Almost surely, 2^{401234256664867} is an apocalyptic number.

401234256664867 is a deficient number, since it is larger than the sum of its proper divisors (1).

401234256664867 is an equidigital number, since it uses as much as digits as its factorization.

401234256664867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 278691840, while the sum is 64.

The spelling of 401234256664867 in words is "four hundred one trillion, two hundred thirty-four billion, two hundred fifty-six million, six hundred sixty-four thousand, eight hundred sixty-seven".