63867398401 has 6 divisors (see below), whose sum is σ = 64010160902. Its totient is φ = 63724953600.

The previous prime is 63867398393. The next prime is 63867398443. The reversal of 63867398401 is 10489376836.

It is a happy number.

63867398401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 252720²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 3153945600 + 60713452801 = 56160^2 + 246401^2 .

It is not a de Polignac number, because 63867398401 - 2³ = 63867398393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63867098401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43201 + ... + 360001.

Almost surely, 2^63867398401 is an apocalyptic number.

It is an amenable number.

63867398401 is a deficient number, since it is larger than the sum of its proper divisors (142762501).

63867398401 is an frugal number, since it uses more digits than its factorization.

63867398401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317699 (or 317250 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 63867398401 in words is "sixty-three billion, eight hundred sixty-seven million, three hundred ninety-eight thousand, four hundred one".