63897830671 has 4 divisors (see below), whose sum is σ = 63911364472. Its totient is φ = 63884296872.

The previous prime is 63897830669. The next prime is 63897830693. The reversal of 63897830671 is 17603879836.

63897830671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 63897830671 - 2¹ = 63897830669 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 (63897830641) 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, 6759816 + ... + 6769261.

It is an arithmetic number, because the mean of its divisors is an integer number (15977841118).

Almost surely, 2^63897830671 is an apocalyptic number.

63897830671 is a deficient number, since it is larger than the sum of its proper divisors (13533801).

63897830671 is a wasteful number, since it uses less digits than its factorization.

63897830671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13533800.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 63897830671 in words is "sixty-three billion, eight hundred ninety-seven million, eight hundred thirty thousand, six hundred seventy-one".