401336771645 has 8 divisors (see below), whose sum is σ = 481639942104. Its totient is φ = 321045539904.

The previous prime is 401336771611. The next prime is 401336771669. The reversal of 401336771645 is 546177633104.

It can be written as a sum of positive squares in 4 ways, for example, as 41323571524 + 360013200121 = 203282^2 + 600011^2 .

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 401336771645 - 2¹⁰ = 401336770621 is a prime.

It is a super-2 number, since 2×401336771645² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 401336771645.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2910554 + ... + 3045323.

It is an arithmetic number, because the mean of its divisors is an integer number (60204992763).

Almost surely, 2^401336771645 is an apocalyptic number.

It is an amenable number.

401336771645 is a deficient number, since it is larger than the sum of its proper divisors (80303170459).

401336771645 is a wasteful number, since it uses less digits than its factorization.

401336771645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5969359.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 401336771645 in words is "four hundred one billion, three hundred thirty-six million, seven hundred seventy-one thousand, six hundred forty-five".