400384616181 has 8 divisors (see below), whose sum is σ = 582377623584. Its totient is φ = 242657343120.

The previous prime is 400384616129. The next prime is 400384616227. The reversal of 400384616181 is 181616483004.

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

It is not a de Polignac number, because 400384616181 - 2¹³ = 400384607989 is a prime.

It is a super-2 number, since 2×400384616181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400384616381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6066433546 + ... + 6066433611.

It is an arithmetic number, because the mean of its divisors is an integer number (72797202948).

Almost surely, 2^400384616181 is an apocalyptic number.

It is an amenable number.

400384616181 is a deficient number, since it is larger than the sum of its proper divisors (181993007403).

400384616181 is a wasteful number, since it uses less digits than its factorization.

400384616181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12132867171.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 400384616181 in words is "four hundred billion, three hundred eighty-four million, six hundred sixteen thousand, one hundred eighty-one".