400541034421561 has 8 divisors (see below), whose sum is σ = 459951427087200. Its totient is φ = 344963570315040.

The previous prime is 400541034421501. The next prime is 400541034421573. The reversal of 400541034421561 is 165124430145004.

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 400541034421561 - 2¹³ = 400541034413369 is a prime.

It is a super-2 number, since 2×400541034421561² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400541034421501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958232139556 + ... + 958232139973.

It is an arithmetic number, because the mean of its divisors is an integer number (57493928385900).

Almost surely, 2^{400541034421561} is an apocalyptic number.

It is an amenable number.

400541034421561 is a deficient number, since it is larger than the sum of its proper divisors (59410392665639).

400541034421561 is a wasteful number, since it uses less digits than its factorization.

400541034421561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916464279559.

The product of its (nonzero) digits is 230400, while the sum is 40.

Adding to 400541034421561 its reverse (165124430145004), we get a palindrome (565665464566565).

The spelling of 400541034421561 in words is "four hundred trillion, five hundred forty-one billion, thirty-four million, four hundred twenty-one thousand, five hundred sixty-one".