63889366171 has 8 divisors (see below), whose sum is σ = 63991312688. Its totient is φ = 63787500000.

The previous prime is 63889366147. The next prime is 63889366201. The reversal of 63889366171 is 17166398836.

63889366171 = T₂₀₆₃₇₉ + T₂₀₆₃₈₀ + T₂₀₆₃₈₁.

It is a happy number.

63889366171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 8-Lehmer number, since φ(63889366171) divides (63889366171-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 63889366171 - 2¹⁹ = 63888841883 is a prime.

It is a super-2 number, since 2×63889366171² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63889366141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684921 + ... + 1722421.

It is an arithmetic number, because the mean of its divisors is an integer number (7998914086).

Almost surely, 2^63889366171 is an apocalyptic number.

63889366171 is the 206381-st centered triangular number.

63889366171 is a deficient number, since it is larger than the sum of its proper divisors (101946517).

63889366171 is a wasteful number, since it uses less digits than its factorization.

63889366171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40173.

The product of its digits is 7838208, while the sum is 58.

The spelling of 63889366171 in words is "sixty-three billion, eight hundred eighty-nine million, three hundred sixty-six thousand, one hundred seventy-one".