400396648161 has 8 divisors (see below), whose sum is σ = 533868711264. Its totient is φ = 266927841920.

The previous prime is 400396648111. The next prime is 400396648243. The reversal of 400396648161 is 161846693004.

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 400396648161 - 2¹³ = 400396639969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400396648161.

It is not an unprimeable number, because it can be changed into a prime (400396648111) 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, 511251 + ... + 1030616.

It is an arithmetic number, because the mean of its divisors is an integer number (66733588908).

Almost surely, 2^400396648161 is an apocalyptic number.

It is an amenable number.

400396648161 is a deficient number, since it is larger than the sum of its proper divisors (133472063103).

400396648161 is a wasteful number, since it uses less digits than its factorization.

400396648161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628431.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 400396648161 in words is "four hundred billion, three hundred ninety-six million, six hundred forty-eight thousand, one hundred sixty-one".