400403404261165 has 8 divisors (see below), whose sum is σ = 483666098923008. Its totient is φ = 318201380869200.

The previous prime is 400403404261141. The next prime is 400403404261241. The reversal of 400403404261165 is 561162404304004.

It is a happy number.

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

It is not a de Polignac number, because 400403404261165 - 2²⁵ = 400403370706733 is a prime.

It is a super-2 number, since 2×400403404261165² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265167816637 + ... + 265167818146.

It is an arithmetic number, because the mean of its divisors is an integer number (60458262365376).

Almost surely, 2^{400403404261165} is an apocalyptic number.

It is an amenable number.

400403404261165 is a deficient number, since it is larger than the sum of its proper divisors (83262694661843).

400403404261165 is a wasteful number, since it uses less digits than its factorization.

400403404261165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530335634939.

The product of its (nonzero) digits is 276480, while the sum is 40.

Adding to 400403404261165 its reverse (561162404304004), we get a palindrome (961565808565169).

The spelling of 400403404261165 in words is "four hundred trillion, four hundred three billion, four hundred four million, two hundred sixty-one thousand, one hundred sixty-five".