401225561216 has 16 divisors (see below), whose sum is σ = 799316547990. Its totient is φ = 200612780544.

The previous prime is 401225561213. The next prime is 401225561239. The reversal of 401225561216 is 612165522104.

It can be written as a sum of positive squares in only one way, i.e., 219660942400 + 181564618816 = 468680^2 + 426104^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (401225561213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1567287221 + ... + 1567287476.

Almost surely, 2^401225561216 is an apocalyptic number.

It is an amenable number.

401225561216 is a deficient number, since it is larger than the sum of its proper divisors (398090986774).

401225561216 is an equidigital number, since it uses as much as digits as its factorization.

401225561216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134574711 (or 3134574699 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 401225561216 in words is "four hundred one billion, two hundred twenty-five million, five hundred sixty-one thousand, two hundred sixteen".