63919279145 has 16 divisors (see below), whose sum is σ = 79498935120. Its totient is φ = 49296916224.

The previous prime is 63919279141. The next prime is 63919279159. The reversal of 63919279145 is 54197291936.

63919279145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 16212419584 + 47706859561 = 127328^2 + 218419^2 .

It is a cyclic number.

It is not a de Polignac number, because 63919279145 - 2² = 63919279141 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (63919279141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1564742 + ... + 1605071.

It is an arithmetic number, because the mean of its divisors is an integer number (4968683445).

Almost surely, 2^63919279145 is an apocalyptic number.

It is an amenable number.

63919279145 is a deficient number, since it is larger than the sum of its proper divisors (15579655975).

63919279145 is a wasteful number, since it uses less digits than its factorization.

63919279145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169964.

The product of its digits is 3674160, while the sum is 56.

The spelling of 63919279145 in words is "sixty-three billion, nine hundred nineteen million, two hundred seventy-nine thousand, one hundred forty-five".