63867404040997 has 4 divisors (see below), whose sum is σ = 63880351016140. Its totient is φ = 63854457065856.

The previous prime is 63867404040941. The next prime is 63867404041009. The reversal of 63867404040997 is 79904040476836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32871027022276 + 30996377018721 = 5733326^2 + 5567439^2 .

It is a cyclic number.

It is not a de Polignac number, because 63867404040997 - 2³⁹ = 63317648227109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63867404040497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6473480172 + ... + 6473490037.

It is an arithmetic number, because the mean of its divisors is an integer number (15970087754035).

Almost surely, 2^{63867404040997} is an apocalyptic number.

It is an amenable number.

63867404040997 is a deficient number, since it is larger than the sum of its proper divisors (12946975143).

63867404040997 is a wasteful number, since it uses less digits than its factorization.

63867404040997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12946975142.

The product of its (nonzero) digits is 219469824, while the sum is 67.

The spelling of 63867404040997 in words is "sixty-three trillion, eight hundred sixty-seven billion, four hundred four million, forty thousand, nine hundred ninety-seven".