63405558570172 has 144 divisors (see below), whose sum is σ = 146335214420640. Its totient is φ = 23760946073088.

The previous prime is 63405558570169. The next prime is 63405558570173. The reversal of 63405558570172 is 27107585550436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63405558570173) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 525355098 + ... + 525475774.

It is an arithmetic number, because the mean of its divisors is an integer number (1016216766810).

Almost surely, 2^{63405558570172} 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 63405558570172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73167607210320).

63405558570172 is an abundant number, since it is smaller than the sum of its proper divisors (82929655850468).

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

63405558570172 is a wasteful number, since it uses less digits than its factorization.

63405558570172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131580 (or 131571 counting only the distinct ones).

The product of its (nonzero) digits is 35280000, while the sum is 58.

The spelling of 63405558570172 in words is "sixty-three trillion, four hundred five billion, five hundred fifty-eight million, five hundred seventy thousand, one hundred seventy-two".