401488244161 has 9 divisors (see below), whose sum is σ = 423744066531. Its totient is φ = 380345878584.

The previous prime is 401488244141. The next prime is 401488244189. The reversal of 401488244161 is 161442884104.

The square root of 401488244161 is 633631.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 390726256561 + 10761987600 = 625081^2 + 103740^2 .

It is not a de Polignac number, because 401488244161 - 2⁷ = 401488244033 is a prime.

It is a super-2 number, since 2×401488244161² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401488244141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12022315 + ... + 12055663.

It is an arithmetic number, because the mean of its divisors is an integer number (47082674059).

Almost surely, 2^401488244161 is an apocalyptic number.

401488244161 is the 633631-st square number.

401488244161 is the 316816-th centered octagonal number.

It is an amenable number.

401488244161 is a deficient number, since it is larger than the sum of its proper divisors (22255822370).

401488244161 is an frugal number, since it uses more digits than its factorization.

401488244161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66736 (or 33368 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 401488244161 in words is "four hundred one billion, four hundred eighty-eight million, two hundred forty-four thousand, one hundred sixty-one".