401261807905 has 8 divisors (see below), whose sum is σ = 550301908032. Its totient is φ = 275150953968.

The previous prime is 401261807851. The next prime is 401261807911. The reversal of 401261807905 is 509708162104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401261807905 - 2⁷ = 401261807777 is a prime.

It is a super-2 number, since 2×401261807905² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732311507 + ... + 5732311576.

It is an arithmetic number, because the mean of its divisors is an integer number (68787738504).

Almost surely, 2^401261807905 is an apocalyptic number.

It is an amenable number.

401261807905 is a deficient number, since it is larger than the sum of its proper divisors (149040100127).

401261807905 is a wasteful number, since it uses less digits than its factorization.

401261807905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11464623095.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 401261807905 in words is "four hundred one billion, two hundred sixty-one million, eight hundred seven thousand, nine hundred five".