401017664 has 14 divisors (see below), whose sum is σ = 795769554. Its totient is φ = 200508800.

The previous prime is 401017651. The next prime is 401017681. The reversal of 401017664 is 466710104.

It can be written as a sum of positive squares in only one way, i.e., 346257664 + 54760000 = 18608^2 + 7400^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3132887 + ... + 3133014.

Almost surely, 2^401017664 is an apocalyptic number.

It is an amenable number.

401017664 is a deficient number, since it is larger than the sum of its proper divisors (394751890).

401017664 is an equidigital number, since it uses as much as digits as its factorization.

401017664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265913 (or 6265903 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 401017664 is about 20025.4254386767. The cubic root of 401017664 is about 737.4306216073.

Adding to 401017664 its reverse (466710104), we get a palindrome (867727768).

The spelling of 401017664 in words is "four hundred one million, seventeen thousand, six hundred sixty-four".