63209494578 has 32 divisors (see below), whose sum is σ = 130692614976. Its totient is φ = 20367664128.

The previous prime is 63209494577. The next prime is 63209494591. The reversal of 63209494578 is 87549490236.

63209494578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63209494578² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63209494577) 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, 1237851 + ... + 1287902.

It is an arithmetic number, because the mean of its divisors is an integer number (4084144218).

Almost surely, 2^63209494578 is an apocalyptic number.

63209494578 is an abundant number, since it is smaller than the sum of its proper divisors (67483120398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63209494578 is a wasteful number, since it uses less digits than its factorization.

63209494578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525898.

The product of its (nonzero) digits is 13063680, while the sum is 57.

The spelling of 63209494578 in words is "sixty-three billion, two hundred nine million, four hundred ninety-four thousand, five hundred seventy-eight".