63528131771 has 4 divisors (see below), whose sum is σ = 68414911152. Its totient is φ = 58641352392.

The previous prime is 63528131747. The next prime is 63528131791. The reversal of 63528131771 is 17713182536.

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 63528131771 - 2²² = 63523937467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63528131791) 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, 2443389671 + ... + 2443389696.

It is an arithmetic number, because the mean of its divisors is an integer number (17103727788).

Almost surely, 2^63528131771 is an apocalyptic number.

63528131771 is a deficient number, since it is larger than the sum of its proper divisors (4886779381).

63528131771 is a wasteful number, since it uses less digits than its factorization.

63528131771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886779380.

The product of its digits is 211680, while the sum is 44.

The spelling of 63528131771 in words is "sixty-three billion, five hundred twenty-eight million, one hundred thirty-one thousand, seven hundred seventy-one".