63863894309537 has 16 divisors (see below), whose sum is σ = 75509792972160. Its totient is φ = 52848901018368.

The previous prime is 63863894309521. The next prime is 63863894309581. The reversal of 63863894309537 is 73590349836836.

It is not a de Polignac number, because 63863894309537 - 2⁴ = 63863894309521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63863890309537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9130463 + ... + 14529044.

It is an arithmetic number, because the mean of its divisors is an integer number (4719362060760).

Almost surely, 2^{63863894309537} is an apocalyptic number.

It is an amenable number.

63863894309537 is a deficient number, since it is larger than the sum of its proper divisors (11645898662623).

63863894309537 is a wasteful number, since it uses less digits than its factorization.

63863894309537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23672840.

The product of its (nonzero) digits is 2116316160, while the sum is 74.

The spelling of 63863894309537 in words is "sixty-three trillion, eight hundred sixty-three billion, eight hundred ninety-four million, three hundred nine thousand, five hundred thirty-seven".