63406401 has 24 divisors (see below), whose sum is σ = 90123264. Its totient is φ = 39644640.

The previous prime is 63406397. The next prime is 63406411. The reversal of 63406401 is 10460436.

It is not a de Polignac number, because 63406401 - 2² = 63406397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63406411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137311 + ... + 137771.

It is an arithmetic number, because the mean of its divisors is an integer number (3755136).

Almost surely, 2^63406401 is an apocalyptic number.

It is an amenable number.

63406401 is a deficient number, since it is larger than the sum of its proper divisors (26716863).

63406401 is a wasteful number, since it uses less digits than its factorization.

63406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 63406401 is about 7962.8136358953. The cubic root of 63406401 is about 398.7594922450.

Adding to 63406401 its reverse (10460436), we get a palindrome (73866837).

The spelling of 63406401 in words is "sixty-three million, four hundred six thousand, four hundred one".