63820867557398 has 32 divisors (see below), whose sum is σ = 109505188396800. Its totient is φ = 27327311145504.

The previous prime is 63820867557353. The next prime is 63820867557401. The reversal of 63820867557398 is 89375576802836.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103157648 + ... + 103774476.

It is an arithmetic number, because the mean of its divisors is an integer number (3422037137400).

Almost surely, 2^{63820867557398} is an apocalyptic number.

63820867557398 is a deficient number, since it is larger than the sum of its proper divisors (45684320839402).

63820867557398 is a wasteful number, since it uses less digits than its factorization.

63820867557398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623444.

The product of its (nonzero) digits is 3657830400, while the sum is 77.

The spelling of 63820867557398 in words is "sixty-three trillion, eight hundred twenty billion, eight hundred sixty-seven million, five hundred fifty-seven thousand, three hundred ninety-eight".