63197553136640 has 264 divisors, whose sum is σ = 168162617396088. Its totient is φ = 22765334691840.

The previous prime is 63197553136621. The next prime is 63197553136771. The reversal of 63197553136640 is 4663135579136.

It can be written as a sum of positive squares in 12 ways, for example, as 53426977509376 + 9770575627264 = 7309376^2 + 3125792^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63197553136640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34585784 + ... + 36367176.

Almost surely, 2^{63197553136640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63197553136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84081308698044).

63197553136640 is an abundant number, since it is smaller than the sum of its proper divisors (104965064259448).

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

63197553136640 is a wasteful number, since it uses less digits than its factorization.

63197553136640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781485 (or 1781454 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 59.

The spelling of 63197553136640 in words is "sixty-three trillion, one hundred ninety-seven billion, five hundred fifty-three million, one hundred thirty-six thousand, six hundred forty".