63787281271 has 4 divisors (see below), whose sum is σ = 72899750032. Its totient is φ = 54674812512.

The previous prime is 63787281269. The next prime is 63787281319. The reversal of 63787281271 is 17218278736.

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 63787281271 - 2¹ = 63787281269 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 (63787287271) 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, 4556234370 + ... + 4556234383.

It is an arithmetic number, because the mean of its divisors is an integer number (18224937508).

Almost surely, 2^63787281271 is an apocalyptic number.

63787281271 is a deficient number, since it is larger than the sum of its proper divisors (9112468761).

63787281271 is an equidigital number, since it uses as much as digits as its factorization.

63787281271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9112468760.

The product of its digits is 1580544, while the sum is 52.

The spelling of 63787281271 in words is "sixty-three billion, seven hundred eighty-seven million, two hundred eighty-one thousand, two hundred seventy-one".