400006081567 has 4 divisors (see below), whose sum is σ = 406563558376. Its totient is φ = 393448604760.

The previous prime is 400006081537. The next prime is 400006081591. The reversal of 400006081567 is 765180600004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400006081567 - 2⁷ = 400006081439 is a prime.

It is a super-3 number, since 3×400006081567³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400006081537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278738313 + ... + 3278738434.

It is an arithmetic number, because the mean of its divisors is an integer number (101640889594).

Almost surely, 2^400006081567 is an apocalyptic number.

400006081567 is a deficient number, since it is larger than the sum of its proper divisors (6557476809).

400006081567 is an equidigital number, since it uses as much as digits as its factorization.

400006081567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557476808.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 400006081567 in words is "four hundred billion, six million, eighty-one thousand, five hundred sixty-seven".