63128481767 has 8 divisors (see below), whose sum is σ = 67986499056. Its totient is φ = 58270747392.

The previous prime is 63128481733. The next prime is 63128481781. The reversal of 63128481767 is 76718482136.

It is a happy number.

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

It is not a de Polignac number, because 63128481767 - 2³⁴ = 45948612583 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 (63128481467) 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, 721148 + ... + 803934.

It is an arithmetic number, because the mean of its divisors is an integer number (8498312382).

Almost surely, 2^63128481767 is an apocalyptic number.

63128481767 is a deficient number, since it is larger than the sum of its proper divisors (4858017289).

63128481767 is a wasteful number, since it uses less digits than its factorization.

63128481767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141457.

The product of its digits is 2709504, while the sum is 53.

The spelling of 63128481767 in words is "sixty-three billion, one hundred twenty-eight million, four hundred eighty-one thousand, seven hundred sixty-seven".