63197947878 has 64 divisors (see below), whose sum is σ = 142395019200. Its totient is φ = 18563973120.

The previous prime is 63197947871. The next prime is 63197947997. The reversal of 63197947878 is 87874979136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63197947871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44358 + ... + 358278.

It is an arithmetic number, because the mean of its divisors is an integer number (2224922175).

Almost surely, 2^63197947878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63197947878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71197509600).

63197947878 is an abundant number, since it is smaller than the sum of its proper divisors (79197071322).

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

63197947878 is a wasteful number, since it uses less digits than its factorization.

63197947878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314057.

The product of its digits is 128024064, while the sum is 69.

The spelling of 63197947878 in words is "sixty-three billion, one hundred ninety-seven million, nine hundred forty-seven thousand, eight hundred seventy-eight".