63728126539 has 12 divisors (see below), whose sum is σ = 80872057368. Its totient is φ = 49658280000.

The previous prime is 63728126533. The next prime is 63728126543. The reversal of 63728126539 is 93562182736.

It is not a de Polignac number, because 63728126539 - 2²⁵ = 63694572107 is a prime.

It is a super-2 number, since 2×63728126539² (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 (63728126533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59116462 + ... + 59117539.

It is an arithmetic number, because the mean of its divisors is an integer number (6739338114).

Almost surely, 2^63728126539 is an apocalyptic number.

63728126539 is a deficient number, since it is larger than the sum of its proper divisors (17143930829).

63728126539 is a wasteful number, since it uses less digits than its factorization.

63728126539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118234026 (or 118234019 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 52.

The spelling of 63728126539 in words is "sixty-three billion, seven hundred twenty-eight million, one hundred twenty-six thousand, five hundred thirty-nine".