63894876578 has 32 divisors (see below), whose sum is σ = 103951182720. Its totient is φ = 29279750400.

The previous prime is 63894876571. The next prime is 63894876587. The reversal of 63894876578 is 87567849836.

63894876578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63894876571) 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, 12627413 + ... + 12632471.

It is an arithmetic number, because the mean of its divisors is an integer number (3248474460).

Almost surely, 2^63894876578 is an apocalyptic number.

63894876578 is a deficient number, since it is larger than the sum of its proper divisors (40056306142).

63894876578 is a wasteful number, since it uses less digits than its factorization.

63894876578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442.

The product of its digits is 487710720, while the sum is 71.

The spelling of 63894876578 in words is "sixty-three billion, eight hundred ninety-four million, eight hundred seventy-six thousand, five hundred seventy-eight".